- 160 - Pacific War Podcast - Invasion of Mindoro - December 10 - 17 - , 1944

Last time we spoke about the fall of Ormoc. The Japanese prepared their Wa offensive as General Arnold’s troops advanced toward Ormoc. On December 5, American forces engaged in fierce fighting for Hills 918 and 380, facing entrenched enemy positions. By December 6, Japanese troops launched a surprise attack on American camps, but a swift counteroffensive from General Swift helped reclaim the Buri airfield. Despite initial gains, poor weather hindered Japanese reinforcements, allowing American forces to stabilize their positions and push back the enemy. Then the 148th battalion launched an attack on Buri. The advancing American troops faced fierce Japanese resistance, with intense battles over strategic locations like the San Pablo airstrip and Hill 380. Despite setbacks, forces rallied, utilizing effective tactics to outmaneuver the enemy. As reinforcements arrived, the Americans secured critical positions and engaged fiercely in Ormoc, leading to significant Japanese losses. The capture of Ormoc disrupted enemy supply lines, marking a pivotal victory that forced the Japanese to keep sending troops into a deteriorating situation.

This episode is the Invasion of Mindoro

Welcome to the Pacific War Podcast Week by Week, I am your dutiful host Craig Watson. But, before we start I want to also remind you this podcast is only made possible through the efforts of Kings and Generals over at Youtube. Perhaps you want to learn more about world war two? Kings and Generals have an assortment of episodes on world war two and much more  so go give them a look over on Youtube. So please subscribe to Kings and Generals over at Youtube and to continue helping us produce this content please check out www.patreon.com/kingsandgenerals. If you are still hungry for some more history related content, over on my channel, the Pacific War Channel you can find a few videos all the way from the Opium Wars of the 1800’s until the end of the Pacific War in 1945. 

Building on our discussion from last week, there were several other events occurring simultaneously with the fall of Ormoc on December 10. At Buri, following a half-hour of concentrated artillery fire, the 1st Battalion of the 149th Regiment launched a final assault that swiftly cleared the airstrip and eliminated the enemy paratrooper forces. Later that evening, the 3rd Battalion of the 13th Independent Regiment arrived in the area in a disorganized state after a challenging march, and with their last reserves of strength, they attacked Burauen town. 

At 19:30 the Japanese launched their final concentrated attack against the airfields. They began to fire at the administration buildings of the Fifth Air Force, and some of the bullets went through the plywood walls of the house of Maj. Gen. Ennis C. Whitehead. "The General ducked a bullet, ordered someone to find out who the blankety-blank was responsible and that he'd blankety-blank better stop or think up a blankety-blank good reason." The air force personnel were pushed back until they reached the hospital, where they halted and held. They then counterattacked and drove the enemy away from the area. The Japanese left thirty of their dead behind them. This marked the retreat of the surviving Japanese forces, indicating the conclusion of the battle for the airstrips. Meanwhile, General Arnold’s 7th Division continued its limited offensive through the challenging mountainous terrain, with the 17th and 184th Regiments reaching Malitbog by the end of the day. To the north, General Cunningham’s 2nd Squadron, which had been engaged with the bulk of the 102nd Division, was finally relieved by the 2nd Squadron of the 7th Cavalry, initiating their westward movement to rejoin the rest of the regiment at the Leyte River. There, the 126th and 127th Regiments struggled to breach the defenses of the 1st Regiment, while the 5th and 12th Cavalry Regiments made slow progress through the mountains towards Mount Cabungaan, effectively bypassing the Mount Pina position. 

In the process of reducing the Japanese-held area, it was estimated that an enemy force of 500 to 600 men had been wiped out. From 28 November to 9 December, the 12th Cavalry remained in the Mt. Badian and Hill 2348 sector, sent out westward patrols, and slowly moved westward. On 10 December, General Sibert decided to have elements of the 1st Cavalry Division debouch from the mountains onto Highway 2 south of the 32d Division and in the Lonoy area. This move was to be concurrent with the expected advance of the 32d Division down the highway. The 1st Squadron, 12th Cavalry, was in the vicinity of Mt. Cabungaan, and the 2d Squadron, on Hill 2348, was 2,000 yards northeast of the 1st Squadron. An enemy strong point existed to the north of the perimeter of the 1st Squadron. The 12th Cavalry spent 10 December in making preparations for a two-squadron assault against this enemy force. The plan was for the 1st Squadron to attack at 0830 while the 2d Squadron from Hill 2348 supported the attack by enveloping the left flank of the enemy. In furtherance of this plan Troop E of the 2d Squadron moved off Hill 2348 at 0800 toward the southwest and dug in for the night just north of Mt. Cabungaan. On the morning of 11 December, an intense mortar and artillery concentration was placed upon the enemy position in front of the 1st Squadron. The fire was so close that fragments frequently fell on the waiting assault troops. After this fire, the 1st Squadron with Troop A in the lead moved out at 0715. At the same time Troop E attacked from the northeast. The enemy defenses consisted of seven or eight pillboxes and many caves dug into the very rugged terrain. The men of Troop A, closely followed by Troop B, charged up the hill "throwing grenades and firing from the hip." The hill fell to the 1st Squadron at 1003 after very heavy hand-to-hand fighting. Troop E had been held up by the terrain and was unable to assist the 1st Squadron. After the capture of the Japanese position, patrols established contact with Troop E at 1200. The regimental reconnaissance platoon returned from the vicinity of Lonoy with the information that the Japanese had prepared strong defensive positions in that area. The platoon had gained a good observation point 900 yards east of Lonoy. The next several days were spent in sending out patrols and moving the 2d Squadron to the position of the 1st Squadron.

Meanwhile, on December 9, Admiral Okawachi had launched what would turn out to be his final TA convoy. This convoy, consisting of three destroyers, two subchasers, and six transport ships carrying the Takahashi Detachment and the Ito Naval Landing Unit, departed from Manila on December 9. A day earlier, the Camotes Detachment had also been dispatched individually via landing barges. In light of the recent enemy landings at Deposito, three units were assigned to deploy in Ormoc and support General Tomochika’s forces in defending the city. However, by December 11, Ormoc had already succumbed, and the convoy finally arrived in Leyte, where it was immediately targeted by American fighter planes. Near Palompon, two transports were struck and left immobilized, prompting an urgent order for the Takahashi Detachment to disembark there and assist the Camotes Detachment during its landing at Palompon. Meanwhile, two destroyers and two transports carrying the Ito Naval Landing Unit continued to Ormoc, where four American destroyers awaited them. This led to a chaotic battle, as artillery, mortars, tank destroyers, and the destroyer Coghlan opened fire on the transports as they unloaded the SNLF Marines northwest of Ormoc. Consequently, one transport was sunk, and another was damaged, necessitating an escort back to Palompon to offload its remaining cargo. Despite this, over 200 Marines managed to land by nightfall, although they could not connect with the Imahori Detachment situated north of Ormoc. 

At 2330 on 11 December the 77th Division beach defense units observed a Japanese convoy, which was transporting the Special Naval Landing Force, steaming into Ormoc Bay with the apparent intention of landing at Ormoc. The Japanese evidently thought that Ormoc was still in their hands. The first craft noticed by the U.S. forces was a landing barge with about fifty men, heading directly for the Ormoc pier. By the time the barge came within range of the shore weapons, all shore units were alert and waited with guns trained upon it. They withheld their fire until the barge was within fifty yards of the pier and then all weapons converged their fires upon the craft. The first rounds squarely hit the barge, which immediately burst into flames. The Japanese clambered atop the gunwales and are reported to have screamed, "Don't shoot," under the mistaken notion that their forces still occupied Ormoc. The harbor was lit up by the burning barge and 60-mm. illuminating shells. During the night the Americans discovered that another enemy vessel, about the size of an LST, had pulled into shore northwest of the town under cover of darkness and was busily engaged in discharging troops and equipment. The tank destroyer guns of the 307th Infantry, emplaced along the beach within 1,000 yards of the vessel, opened fire on it while forward observers from the 902d Field Artillery Battalion directed artillery fire upon the landing area and inland. The enemy vessel attempted to pull out to sea, but after proceeding less than fifty yards it burst into flames and sank. About 150 men, two tanks, a number of rifles, mortars, and machine guns, and a quantity of ammunition had been unloaded before the vessel sank, but most of the supplies, including four ammunition trucks, had been destroyed by American fire while the vessel was unloading. The early dawn of 12 December revealed another ship of the same type farther west near Linao. The artillery, mortars, and tank destroyer guns opened up against this vessel as it fled along the shores of Ormoc Bay, and their fire followed until it was out of range. Before the fire ceased, heavy clouds of smoke billowed from the vessel as it moved at a snail's pace. During the night the American fire had to be closely coordinated, since American vessels, including a resupply convoy, were in the bay. Not a single U.S. craft was damaged. Troops of the Special Naval Landing Force who had disembarked got in touch with Colonel Imahori, who immediately ordered them to go to Highway 2 as the reserve unit of the 12th Independent Infantry Regiment. It was impossible for them to carry out the order, since the 77th Division had advanced north from Ormoc. They thereupon decided to join a naval airfield construction unit at Valencia, but again they failed. In the latter part of December, the men of the Special Naval Landing Force were in the eastern part of the Palompon area without having taken part in the battle for the Ormoc corridor. On the journey back to Manila, the Uzuki was sunk by two PT boats near Leyte on December 12. The rest of the convoy was also assaulted by 46 aircraft off Cebu, leading to the sinking of the Yuzuki and one transport. This incident marked the final TA convoy of the war, as the fall of Ormoc made the operation pointless. Similarly, plans for a counterlanding at Carigara Bay with the 39th Regiment were also scrapped.

The nine TA convoys successfully transported an estimated 45,000 men and 10,000 tons of supplies and equipment to Leyte; however, this came at a significant cost. The Southwest Area Fleet incurred losses that included one light cruiser, nine destroyers, three submarines, three subchasers, two frigates, and 26 transports. Additionally, during enemy carrier strikes on Luzon and the Visayas, the fleet lost one heavy cruiser, two light cruisers, five destroyers, one submarine, three subchasers, three frigates, 19 transports, and four oilers. On December 11, General Bruce launched an aggressive defense of Ormoc, planning to advance his troops daily to establish new forts or blockhouses by nightfall until Valencia was secured. Consequently, the 307th Regiment and the 1st Battalion of the 306th Regiment attempted to cross the Antilao River but encountered intense fire and were quickly pinned down. Meanwhile, the 3rd Battalion of the 306th managed to advance despite facing increasing resistance from the Imahori Detachment at Cogon but was ultimately compelled to withdraw due to heavy enemy fire. At the same time, the bulk of the 305th Regiment repositioned to the right of the 307th, while the 17th and 184th Regiments completed their limited offensive, successfully crossing the Talisayan River without opposition and reaching the Binoljo area, with the 2nd Battalion of the 184th advancing to Ipil to establish contact with the 77th Division. At this stage, General Yamagata's units had retreated into the mountains, regrouping north of Talisanyan to initiate their final withdrawal to Ormoc. However, their escape route had been entirely cut off, and they were being pursued from the east by the bulk of General Swing's 11th Airborne Division.

As General Gill's offensive progressed, his infantry began assaulting enemy artillery positions in the north. Simultaneously, the 2nd Squadron, 7th Cavalry launched an attack against the 102nd Division units; however, the defenders managed to hold the cavalrymen back at the hill's base. Meanwhile, General Suzuki was hastily retreating toward Huaton, where he was expected to arrive by December 13. His strategy involved waiting for the 5th and 77th Regiments to reach his position before executing a robust counterattack to reclaim Ormoc. The 68th Brigade was tasked with bolstering the beleaguered 1st Division, which had incurred over 3,000 casualties since the start of hostilities. Returning to the frontline developments, the previous day’s intense fighting compelled Bruce to solidify his positions on December 12. He organized the delivery of supplies and supporting artillery to bombard enemy defenses while dispatching strong patrols for reconnaissance. At the same time, the 17th and 184th Regiments successfully gathered at the Panilahan River in preparation to reinforce the 77th Division. On the following day, after a significant artillery bombardment, a specialized attack force led by Colonel Paul Freeman, comprising two companies from the 305th Regiment, was dispatched to assault Colonel Imahori’s primary blockhouse at Cogon. Meanwhile, the remainder of the regiment targeted other enemy positions along the ridge. While the infantry managed to advance to the ridge, Freeman's companies were unable to progress further, ultimately forcing the 305th to retreat.

Simultaneously, the 307th Regiment advanced westward along the Ormoc-Linao road and successfully captured Linao. Although the 77th Division had pushed its western boundary forward by approximately 1,000 yards during the day, the central front lines remained largely unchanged since morning, necessitating General Bruce to launch another attack the following day. Meanwhile, Arnold sent the 32nd Regiment to connect with the 11th Airborne Division to aid in its withdrawal from the mountains. 

On the morning of 13 December the 2d Battalion, 126th Infantry, with the assistance of its tanks and heavy mortars, pushed past the Japanese who had held up its advance. In the face of most determined opposition the battalion moved south, destroying the pockets of resistance which had been bypassed. At the end of the day the 2d Battalion had advanced 400 yards to a position 200 yards north of a roadblock set up by the 3d Battalion, 126th Infantry. The 3d Battalion, less Company L, which was to remain on the high ground overlooking the road, was to attack south on the east side of Highway 2 and come abreast of the 1st Battalion, 126th Infantry. At 1521 the 3d Battalion reported that six enemy tanks were coming up the highway. After heavy fighting, the Japanese tanks withdrew at nightfall and returned to the south. The 1st Battalion, 126th Infantry, the southernmost unit of the division, made plans to dislodge the enemy force between it and the 3d Battalion. The contested ground consisted of an open space 600 to 700 yards long and 200 to 300 yards wide, at the southern end of which were two knolls. The 1st Battalion had men on both knolls but did not control the northern end of the sector where the Japanese had dug in and were using machine guns, mortars, and rifles. The 1st Battalion charged against the Japanese and rooted them out with grenades and mortar fire. Except for this action, only slight gains were registered during the day. The men of the battalion were hungry, having been without food since the previous afternoon. The commanding officer of the battalion renewed a request for additional rations and ammunition, since the one-third ration that had been received the day before was insufficient. The 1st and 2d Battalions of the 127th Infantry received orders from the regimental commander to advance south with the 1st Battalion on the left, pinch out the 3d Battalion, 126th Infantry, and link up with the 1st Battalion, 126th Infantry. The 1st Battalion, 127th Infantry, moved out in a column of companies and had advanced 400 yards when it encountered forty to fifty Japanese on a ridge to its front, about 150 yards west of the road. The enemy threw blocks of TNT and grenades against the battalion, effectively pinning down the troops. A night perimeter was established. The 2d Battalion, 127th Infantry, moved abreast of the regiment's 1st Battalion throughout the day. Its advance was bitterly contested by the Japanese, who employed machine guns, mortars, and rifles against the battalion, which dug in for the night under fire. At 1630 the 11th Field Artillery Battalion fired upon fifteen Japanese who were walking along the road south of Lonoy and killed twelve of them. The night of 13-14 December was not quiet. At 2300 an enemy force from the 1st Infantry Regiment broke into the command post of the 126th Infantry. The Japanese set up a machine gun in the area and attacked with grenades and rifles. Bitter hand-to-hand fighting ensued but by 0325 the enemy force was evicted and the area had quieted down. At 0630, with the coming of dawn, the Headquarters Company got things in order and everyone was "happy to hear sound of comrade's voices." Six Japanese were killed and two Americans and two Filipinos wounded.

On December 14, nearly all battalions of the 126th and 127th Regiments were actively advancing and maintaining physical contact with one another, successfully pushing over two miles south of Limon. At 0730 on the morning of 13 December, the 2d Squadron, 7th Cavalry, moved out and came under fire from two Japanese machine guns well emplaced on a cliff. The ridge narrowed to ten feet with sixty-degree slopes, making forward passage almost impossible. The troops were pinned down. In the meantime, Troop F of the squadron worked south in an attempt to envelop the rear of the enemy force but was unable to do so and returned. The 2d Squadron established night perimeters near the same positions it had held the previous night. On the following morning the 75-mm. and 105-mm. artillery and the 4.2-inch and 60-mm. mortars began to register heavy fire on the Japanese strong point. At 1200 Troop G of the 2d Squadron jumped off, attacking the enemy position frontally while Troop F moved in from the rear. Employing flame throwers, Troop G steadily pushed forward and by 1445 had knocked out four enemy bunkers and destroyed several machine guns. Of more importance, it was fifty yards beyond the enemy front lines. Troop F also continued to advance. By the end of the day the enemy force had been rooted off the high ground, and the 2d Squadron, 7th Cavalry, was in firm possession of the ridge. The unit captured a quantity of enemy ordnance, including 12 light and 3 heavy machine guns, 9 grenade launchers, and 73 rifles, together with considerable quantities of grenades and ammunition. Before the ridge was secured, "over 5000 rounds of artillery fire had been placed on [the] . . . position without appreciably affecting it." On 14 December, the 12th Cavalry was ordered to continue west to Highway 2 and assist the advance of the 32d Division, to establish a roadblock on the highway, and to attack the hostile forces to the north between it and the 32d Division. In furtherance of this order, the 1st Squadron, less A and C Troops, moved west on 15 December toward a previously reconnoitered area that was about 1,800 yards east of the barrio of Lonoy. This site, a banana plantation, was chosen for its observation facilities to the west and as an excellent dropping ground for supplies. The 1st Squadron, having encountered little opposition, closed on the area before dusk. Thereupon the rest of the regiment was ordered to close in on the area before nightfall on 17 December.

At 0930 on 14 December Colonel Freeman prepared his special assault force to renew the attack. Before the jump-off, artillery and mortars laid their fire on the blockhouse and beyond. Under cover of artillery fire the troops cautiously moved out at 1030 with Company L on the right and by 1105 they had advanced 100 yards. Company L knocked out two pillboxes with flame throwers and a tank destroyer gun. Company E found every step of the way contested. The troops used hand grenades and bayonets and literally forced the enemy out of the foxholes in tough hand-to-hand fighting. Capt. Robert B. Nett, the commanding officer of Company E, although seriously wounded, refused to relinquish his command. He led his company forward and killed seven Japanese with his rifle and bayonet. Captain Nett was awarded the Medal of Honor. While Company E was so engaged, Company L on its right advanced through dense foliage and burnt the Japanese out of their foxholes and the bamboo thicket with flame throwers. The company was assisted by armored bulldozers from the 302d Engineers. For a hundred yards on all sides of the blockhouse, the enemy had dug many deep foxholes only a few yards apart. All the foxholes were covered, some with coconut logs and earth, and others with improvised lids of metal and earth. One was protected by an upturned bathtub. The armored bulldozer drove over the positions, its blades cutting off the tops of the foxholes, after which small arms fire into the holes killed the occupants. The crews of the tank destroyers not only fired point-blank at targets but opened the escape hatches and dropped grenades into the foxholes. At 1240 the blockhouse, or what remained of it, was secured.

Meanwhile, the 1st Battalion, 305th Regiment executed a flanking maneuver around the blockhouse, subsequently shifting 1,000 yards to the east to intercept the enemy's communication lines along Highway 2. On December 15, the 77th Division consolidated its positions and dispatched small patrols, effectively securing the port of Ormoc. Since the initial landings, the 77th estimated that they had killed 3,046 Japanese soldiers and captured 9 prisoners at the expense of 103 soldiers killed, 318 wounded, and 26 missing. With the 184th Regiment taking over the defense of Ormoc, Bruce's troops were now able to prepare for their advance toward Valencia and beyond, aiming to connect with General Sibert's 10th Corps, which was still making its way southward. However, we must shift our focus from Leyte to address another significant development in the Philippines. 

While Admiral Nimitz was strategizing his invasions of Iwo Jima and Okinawa—topics we will delve into further in the future—General MacArthur reluctantly postponed the Mindoro operation until December 15 to give Admiral Kinkaid time to assemble a robust escort carrier group to protect General Dunckel's Western Visayan Task Force during its landing on Mindoro. This group, composed of six escort carriers, three aging battleships, three cruisers, and 18 destroyers commanded by Rear-Admiral Theodore Ruddock, was tasked with safeguarding Admiral Struble's Task Group 78.3, now renamed the Mindoro Attack Group, alongside Admiral Berkey's Close Covering Group, which included three cruisers and seven destroyers. Additionally, Admiral McCain's Task Force 38 was ordered to assist Operation Love with a series of strikes against the main airbases on Luzon. Although the prime airfield locations on Mindoro were situated in the northeast, perilously close to Japanese air concentrations in Luzon, MacArthur chose to establish a beachhead and airfield sites near San Jose in the southwest corner.

The 503rd Parachute Regiment was designated to land on the Green and Blue Beaches around the Bugsanga River, while the majority of the 19th Regiment would come ashore at the White Beach near Mangarin Bay. Meanwhile, General Yamashita had been convinced since early November that Leyte would fall, prompting him to strategize for the defense of Luzon. He thought the Americans would try to establish advance air bases in the western Visayas rather than on Mindoro, as the Japanese believed Mindoro had limited suitable locations for operational airfield construction. This belief hindered Yamashita’s ability to reinforce either these positions or the already weakened defenses on Luzon, as Field Marshal Terauchi persistently pressured him to send all available reinforcements to Leyte. Realizing he could not engage in a decisive battle on Luzon without substantial reinforcements, Yamashita began planning a delaying defense strategy, where his existing forces would conduct operations aimed at exhausting enemy resources. In preparation for the worst-case scenario, the 14th Area Army started organizing positions for a prolonged defense in the mountainous regions around Baguio and north of San Jose, west of Tarlac, and east of Manila. At this stage, Yamashita had the 61st Independent Mixed Brigade stationed on the Batan and Babuyan Islands, the 103rd Division in northern Luzon, the 58th Independent Mixed Brigade in the Lingayen Gulf area, the 2nd Tank Division near San Miguel-Cabanatuan, the 8th Division in Batangas Province, the 11th Independent Regiment in the sectors around Baler and Dingalan Bay, the 82nd Brigade in the Lamon Bay region, the remainder of the 105th Division in the Legaspi and Naga areas, and most of the 23rd Division in the San Jose and Umingan sectors.

In addition, the Manila Defense Force, established on November 1, comprised four provisional infantry battalions and five infantry companies, tasked with defending Manila and the Bataan Peninsula. Furthermore, the 8th Division was charged with the defense of Mindoro; however, the island was only protected by two provisional companies from the 359th Independent Battalion, which were deployed there to bolster the local naval garrisons and air personnel. On December 12, Struble’s convoy finally set sail from Leyte Gulf towards Mindoro. Struble's forces steamed on through the Mindanao Sea unmolested until the afternoon of 13 December. Japanese Army and Navy planes had had the three groups under surveillance since 0900, but had not attacked pending receipt of information on the force's destination. In midafternoon ten Japanese Navy planes, including three designated as suicide bombers--the dread kamikazes--flew up from a field on Cebu and found the Allied force off the southeastern corner of Negros Island. Unobserved by lookouts and undetected by radar, which nearby land masses blanketed, one kamikaze flew in low over the water and crashed with a mighty roar on the light cruiser Nashville, Admiral Struble's flagship. Combined explosions from the plane's bomb and ship's ammunition wrecked the flag bridge, the communications office, and the combat information center. Over 130 men were killed outright, including General Dunckel's chief of staff, the 310th Bombardment Wing's commander, Admiral Struble's chief of staff, and Task Group 78.3's communications and medical officers. The wounded, numbering about 190, included Dunckel, who was painfully but not seriously injured and burned. Struble and Dunckel quickly transferred to the destroyer Dashiell, which also took aboard some of the members of both officers' staffs. The rest of the staffs and the wounded sailed back to Leyte on the Nashville, protected by the destroyer Stanly.

Later that afternoon, another kamikaze struck the destroyer Haraden, which also had to return to Leyte, resulting in 15 fatalities and 25 injuries. Additionally, Admiral Shima’s 2nd Striking Force was instructed to relocate from Lingga to Camranh Bay in anticipation of a potential sortie. Despite this, the Americans continued their advance, and fortunately for them, the Japanese were searching in the western Visayas, causing them to miss the opportunity to attack on December 14. Meanwhile, McCain’s carriers launched a significant strike against Luzon, while Ruddock’s carriers effectively diverted enemy attention with attacks on air concentrations in Panay and Negros Islands.

By late afternoon of the 14th the location of the convoy in the southern waters of Mindoro Strait made it clear that the objective lay beyond the western Visayas. For the first time Fourteenth Area Army estimated that the landing would take place on Mindoro and ordered the 8th Division to alert its outposts there. It was also a serious possibility,, however, that the enemy might strike directly at Luzon. General Yamashita therefore issued a warning to Area Army forces throughout central Luzon. As a further precaution, the Nagayoshi Detachment, which was awaiting shipment to Leyte, and the 71st Infantry Regiment of the 23d Division, which had just reached Manila, were ordered to deploy immediately to Bataan Peninsula and Batangas, respectively, to meet potential enemy landings in those sectors. The Navy and air commands in Manila saw much greater probability of a landing on Luzon than on Mindoro. They therefore directed all subordinate units and installations to prepare for action against both enemy amphibious forces and possible airborne attack groups.

Additionally, Army and Navy aircraft were quickly organized to target enemy shipping. Meanwhile, Struble’s convoy anchored near San Jose and began preparations for the landings, which would catch the few defenders of Mindoro off guard. As troops transferred to the landing crafts and surface vessels commenced the pre-landing bombardment, McCain’s carrier aircraft launched another assault on Luzon, inflicting substantial casualties. Assisted by Ruddock’s carriers, they successfully shot down eight out of fifteen kamikaze attackers targeting the shipping off the island. For the loss of 35 aircraft, the Americans estimated they destroyed around 450 Japanese planes during this operation. Nevertheless, the Japanese continued their assault, damaging two LSTs that would later sink, as well as one LSM. In the heroic action, the destroyer USS Moale (DD-693), under the command of Commander Walter M. Foster, went alongside the burning LST-738 (which was loaded with aviation fuel and ordnance) to rescue crewmembers. Several explosions aboard LST-738 caused damage to Moale as she pulled away. Some pieces of shrapnel were two feet square and they put four holes in Moale's hull. Gunner's Mate Ed Marsh reported that a one-gallon jar of vaseline from the LST's cargo splattered on one barrel of his twin 40 mm Bofors AA gun, providing unwelcome lubrication. Moale suffered one fatality and thirteen wounded. In addition, Moale also rescued 88 survivors.

Despite this damage, they were unable to prevent the successful landings of the 19th Regiment and the 503rd Parachute Regiment, which quickly unloaded and advanced seven miles inland to secure the objective beachhead line. Consequently, the few Japanese units present in the area were compelled to retreat inland toward Bulalacao. Meanwhile, engineers promptly began construction on the new Hill Drome, which would be completed by December 20. The second Ellmore Field was projected to be ready for limited use three days later and for continuous dry-weather operations by December 28, a week ahead of schedule.

On the morning of December 16, a slow-moving tow convoy consisting of small tankers, barges, and LCTs, accompanied by destroyers, arrived off Mindoro after suffering the loss of a small Army tanker that was sunk and a destroyer that was damaged by kamikaze attacks during the journey. Concurrently, McCain carried out his final strike against Luzon, unfortunately resulting in the sinking of the hellship Oryoku Maru, which was carrying 1,620 prisoners of war, with over 200 lives lost. The burden of taking their fellow soldiers' lives would not be the only consequence for the Americans, as the fierce Typhoon Cobra soon battered Task Force 38, sinking the destroyer Spence and damaging nine additional warships. Despite these significant losses, the Mindoro operation was ultimately a complete success. Although MacArthur aimed to launch his amphibious invasion of Lingayen Gulf just 15 days after capturing Mindoro, considerations such as the lunar and tidal conditions at Lingayen Gulf, the necessity to rest and replenish the units of Kinkaid’s 7th Fleet, and the ongoing slow progress in airfield construction on Leyte—required for establishing a much larger airbase at Mindoro—ultimately compelled him to delay Operation Mike I until January 9. Conversely, the invasion of Mindoro, signaling that the final advance on Luzon would soon take place, prompted Terauchi to recognize that Leyte was a lost cause. As a result, the decisive battle at Leyte was immediately halted, the 35th Army was instructed to hold the southern Philippines for as long as possible, and the 14th Area Army was ordered to expedite its defensive preparations on Luzon and quickly respond to the enemy landing on Mindoro.

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Intense battles unfolded as American forces aggressively pushed back a chaotic Japanese retreat, marking a pivotal moment in the fight for Ormoc, while enemy convoys faced destruction and retreat marked the war's shifting tide. US forces battled fiercely on Leyte and Mindoro, overcoming Japanese resistance and kamikaze attacks to secure key positions for the Luzon invasion.