Philippines campaign (1944–1945)

The Philippines campaign, Battle of the Philippines, Second Philippines campaign, or the Liberation of the Philippines, codenamed Operation Musketeer I, II, and III, was the American, Mexican, Australian and Filipino campaign to defeat and expel the Imperial Japanese forces occupying the Philippines during World War II.

Philippines campaign (1944–1945)
Part of the Pacific Theater of World War II

General Douglas MacArthur, President Osmeña, and staff land at Palo, Leyte on October 20, 1944.
Date20 October 194415 August 1945
Result Allied victory

Liberation of the Philippines from Japan


 United States

 Australia (naval & air)
 Mexico (air support)


Commanders and leaders
Douglas MacArthur
Sergio Osmeña
Chester W. Nimitz
Walter Krueger
Robert L. Eichelberger
William Halsey Jr.
Thomas C. Kinkaid
George C. Kenney
John Collins
Tomoyuki Yamashita
José P. Laurel
Akira Mutō
Sōsaku Suzuki 
Shizuo Yokoyama
Soemu Toyoda
Takeo Kurita
Jisaburō Ozawa
Sanji Iwabuchi 
Units involved
6th Army
XXIV Corps
6th Army Reserves
8th Army

5th Air Force
3rd Fleet
7th Fleet
Task Force 74
14th Area Army
Directly controlled
  • 1st Infantry Division
  • 10th Infantry Division
  • 19th Infantry Division
  • 23rd Infantry Division
  • 26th Infantry Division
  • 103rd Infantry Division
  • 105th Infantry Division
  • 2nd Tank Division
  • 68th Infantry Brigade
  • 55th Mixed Brigade
  • 58th Mixed Brigade
35th Army
  • 16th Infantry Division
  • 30th Infantry Division
  • 100th Infantry Division
  • 102nd Infantry Division
  • 54th Mixed Brigade
41st Army
  • 9th Artillery HQ
  • 8th Infantry Division
  • 39th Mixed Brigade
  • 65th Infantry Brigade

4th Air Army
  • 6th Air Division
  • 7th Air Division

Combined Fleet

Navy Air Service

30,000+ guerrillas[2]
~6,000 militia[5][6][7]
Casualties and losses



  • Army: 16,233 dead and missing,
    47,166 wounded[nb 1]
  • Navy: 7,270+ dead and wounded[nb 2]
  • Tens of thousands hospitalized due to disease[13]


33+ ships sunk
95+ ships damaged
485+ aircraft[11][14]




~10 (5 in non-combat)[16]



  • 420,000 dead and missing[17]
  • 10,000 casualties at Leyte Gulf.[18]
  • (80% of Japanese deaths were from starvation or disease)[19]


93+ ships sunk
1,300 aircraft[11][14]

The Japanese Army overran all of the Philippines during the first half of 1942. The liberation of the Philippines from Japan commenced with amphibious landings on the eastern Philippine island of Leyte on October 20, 1944. The United States and Philippine Commonwealth military forces, as well as naval and air support by Mexico and Australia were progressing in liberating territory and islands when the Japanese forces in the Philippines were ordered to surrender by Tokyo on August 15, 1945, after the dropping of the atomic bombs on mainland Japan and the Soviet invasion of Manchuria.


By mid-1944, American forces were only 300 nautical miles (560 km) southeast of Mindanao, the largest island in the southern Philippines – and able to bomb Japanese positions there using long-range bombers. American forces under Fleet Admiral Chester W. Nimitz had advanced across the Central Pacific Ocean, capturing the Gilbert Islands, some of the Marshall Islands, and most of the Marianas Islands, bypassing many Japanese Army garrisons and leaving them behind, with no source of supplies and militarily impotent.

Aircraft carrier-based warplanes were already conducting air strikes and fighter sweeps against the Japanese in the Philippines, especially their military airfields. U.S. Army and Australian Army troops under the American General Douglas MacArthur, the Supreme Commander of the Southwest Pacific Theater of Operations, had either overrun, or else isolated and bypassed, all of the Japanese Army on New Guinea and the Admiralty Islands. Before the invasion of the Philippines, MacArthur's northernmost conquest had been at Morotai in the Dutch East Indies on September 15–16, 1944. This was MacArthur's one base that was within bomber range of the southern Philippines.

U.S. Navy, Marine Corps, and Army as well as Australian and New Zealand forces under the commands of General MacArthur and Admiral William F. Halsey, Jr. in Operation Cartwheel had isolated the large Japanese South Pacific base at Rabaul, New Britain, by capturing a ring of islands around Rabaul, and then building air bases on them from which to bomb and blockade the Japanese forces at Rabaul into military impotence.[lower-alpha 1][20]

With victories in the Marianas campaign (on Saipan, on Guam, and on Tinian, during June and July 1944), American forces were getting close to Japan itself. From the Marianas, the very long-range B-29 Superfortress heavy bombers of the U.S. Army Air Forces (USAAF) could bomb the Japanese home islands from well-supplied air bases – ones with direct access to supplies via cargo ships and tankers. (The earlier B-29 bombing campaign against Japan had been from the end of a very long and tortuous supply line via British India and British Burma – one that proved to be woefully inadequate. All B-29s were transferred to the Marianas during the fall of 1944.)

Although Japan was obviously losing the war, the Japanese Government, and the Imperial Japanese Army and Navy, showed no sign of capitulation, collapse, or surrender.

There had been a close relationship between the people of the Philippines and the United States since 1898, with the Philippines becoming the Commonwealth of the Philippines in 1935, and promised their independence in mid-1946. Furthermore, an extensive series of air attacks by the American Fast Carrier Task Force under Admiral William F. Halsey against Japanese airfields and other bases on the Philippines had drawn little Japanese opposition, such as interceptions by the Japanese Army fighter planes. Upon Admiral Halsey's recommendation, the Combined Chiefs of Staff, meeting in Canada, approved a decision not only to move up the date for the first landing in the Philippines, but also to move it north from the southernmost island of Mindanao to the central island of Leyte, Philippines. The new date set for the landing on Leyte, October 20, 1944, was two months before the previous target date to land on Mindanao.

The Filipino people were ready and waiting for the invasion. After General MacArthur had been evacuated from the Philippines in March 1942, all of its islands fell to the Japanese. The Japanese occupation was harsh, accompanied by atrocities and with large numbers of Filipinos pressed into slave labor. From mid-1942 through mid-1944, MacArthur and Nimitz supplied and encouraged the Filipino guerrilla resistance by U.S. Navy submarines and a few parachute drops, so that the guerrillas could harass the Japanese Army and take control of the rural jungle and mountainous areas – amounting to about half of the archipelago. While remaining loyal to the United States, many Filipinos hoped and believed that liberation from the Japanese would bring them freedom and their already-promised independence.

The Australian government offered General MacArthur the use of the First Corps of the Australian Army for the Liberation of the Philippines. MacArthur suggested that two Australian infantry divisions be employed, each of them attached to a different U.S. Army Corps, but this idea was not acceptable to the Australian Cabinet, which wanted to have significant operational control within a certain area of the Philippines, rather than simply being part of a U.S. Army Corps.[21] No agreement was ever reached between the Australian Cabinet and MacArthur – who might have wanted it that way. However, units from the Royal Australian Air Force and the Royal Australian Navy, such as the heavy cruiser HMAS Australia, were involved.

In addition to rejecting Australian ground troops MacArthur also rejected the use of U.S. marines for major ground combat operations during the whole 10 months of the Philippines campaign. The only contributions by the U.S. Marine Corps in this campaign were USMC aircraft and aviators, who greatly helped to provide air cover for the U.S. Army soldiers and assisted U.S. Army Air Forces aircraft, and one small USMC artillery unit, V Amphibious Corps (VAC) Artillery, commanded by Brigadier General Thomas E. Bourke. These 1,500 USMC artillerymen only fought in the Philippines during the Battle of Leyte from October 21 to December 13. This small artillery corps was the only USMC ground combat unit that served in the Philippines in 1944-45.[22]

During the American re-conquest of the Philippines, the guerrillas began to strike openly against Japanese forces, carried out reconnaissance activities ahead of the advancing regular troops, and took their places in battle beside the advancing American divisions.[23][24]


The four main actions in the Battle of Leyte Gulf: 1 Battle of the Sibuyan Sea 2 Battle of Surigao Strait 3 Battle off Cape Engaño 4 Battle off Samar. Leyte Gulf is north of 2 and west of 4. The island of Leyte is west of the gulf.

On October 20, 1944, the U.S. Sixth Army, supported by naval and air bombardment, landed on the favorable eastern shore of Leyte, one of the islands of the Visayas island group, northeast of Mindanao. The Japanese miscalculated the relative strength of the naval and air forces, and they attempted to destroy the landing. This brought about the massive sequence of battles called the Battle of Leyte Gulf, fought on October 23 through October 26. This decisive victory by the U.S. Navy, its Fast Carrier Task Force, its surface fleet, and its submarines effectively destroyed the remainder of the Imperial Japanese Navy (IJN), which had already lost all of its effective aircraft carrier forces. The IJN had four of its carriers sunk (ships with depleted air squadrons – which were used only as decoys), numerous battleships and heavy cruisers, and a large number of light cruisers and destroyers. The IJN was never able to fight a major battle after this.

The U.S. Sixth Army continued its advance from the east, as the Japanese rushed reinforcements to the Ormoc Bay area on the western side of the island. While the Sixth Army was continually reinforced, the U.S. Fifth Air Force and the U.S. 3rd Fleet's Task Force 38 were able to devastate the Japanese attempts at air attacks and at landing new reinforcements and supplies, and also provide much support to the Army's ground troops during what is known as the Battle of Ormoc Bay from November 11 to December 21, 1944.

The Filipino guerrillas also performed valuable service in maintaining public order and in keeping the roads and highways free of congestion. After the American beachheads were established, the Leyte guerrilla groups were attached directly to the Sixth Army corps and divisions to assist in scouting, intelligence, and combat operations.[25] With the initial U.S. Sixth Army landings on the beaches at Tacloban and Dulag, Colonel Ruperto Kangleon's units went into action. They dynamited key bridges to block Japanese displacement toward the target area; they harassed enemy patrols; and they sabotaged supply and ammunition depots. Information on enemy troop movements and dispositions sent from guerrilla outposts to Kangleon's Headquarters was dispatched immediately to Sixth Army.[26]

During many torrential rains and over difficult terrain, the advance continued across Leyte and onto the major island of Samar, just north of Leyte. On December 7, 1944, the U.S. Army units made another amphibious landing at Ormoc Bay and, after a major land and air battle, the landing force cut off all Japanese ability to reinforce and resupply their troops on Leyte. Although fierce fighting continued on Leyte for months, the U.S. Army was always in control.


The U.S. 6th Army's second major target to attack was Mindoro. This large island is directly south of Luzon and Manila Bay, and MacArthur's main goal in taking it was to be able to construct airfields on it for fighter planes that could dominate the sky over the most-important island of Luzon, with its major seaport and capital city of Manila.[27]

The Seventh Fleet's large invasion convoy from Leyte to Mindoro came under strong attack by kamikazes, but they could not delay the American invasion of Mindoro.[28] Mindoro was only lightly occupied by the Japanese Army, and much of it was held by Filipino guerrillas, so Mindoro was quickly overrun. U.S. Army engineers set about rapidly constructing a major air base at San Jose. Besides being close to Luzon, Mindoro has another advantage: good flying weather nearly all the time, because this is a part of the Philippines that is relatively dry – quite unlike Leyte which receives torrential rains most of the year, not only giving it poor flying weather, but making it very muddy and difficult to construct airfields.

Mindoro was also the location of another breakthrough: the first appearance during the War in the Pacific of USAAF squadrons flying the fast, long-range P-51B Mustang fighters. Mindoro was a major victory for the 6th Army and the USAAF, and it also provided the major base for the next move of MacArthur's 6th Army: the invasion of Luzon, especially at Lingayen Gulf on its western coast.


Japanese leaflet designed to discourage the landing American troops.
Troops of the 185th Inf., 40th Div., take cover behind advancing tanks while moving up on Japanese positions on Panay Island

On December 15, 1944, landings against minimal resistance were made on the southern beaches of the island of Mindoro, a key location in the planned Lingayen Gulf operations, in support of major landings scheduled on Luzon. On January 9, 1945, on the south shore of Lingayen Gulf on the western coast of Luzon, General Krueger's Sixth Army landed his first units. Almost 175,000 men followed across the twenty-mile (32 km) beachhead within a few days. With heavy air support, Army units pushed inland, taking Clark Field, 40 miles (64 km) northwest of Manila, in the last week of January.

Two more major landings followed, one to cut off the Bataan Peninsula, and another, which included a parachute drop, south of Manila. Pincers closed on the city. On February 3, 1945, elements of the U.S. 1st Cavalry Division pushed into the northern outskirts of Manila, and the 8th Cavalry Regiment (organized as infantry) passed through the northern suburbs and into the city itself.

As the advance on Manila continued from the north and the south, the Bataan Peninsula was rapidly secured. On February 16, paratroopers and amphibious units simultaneously assaulted the islet of Corregidor. Taking this stronghold was necessary because troops there could block the entrance of Manila Bay. The Americans needed to establish a major harbor base at Manila Bay to support the expected invasion of Japan, planned to begin on November 1, 1945. Resistance on Corregidor ended on February 27, and then all resistance by the Japanese Empire ceased on August 15, 1945, obviating the need for an invasion of the Japanese Home Islands.

Despite initial optimism, fighting in Manila was harsh. It took until March 3 to clear the city of all Japanese troops, and the Japanese Marines, who fought on stubbornly and refused to either surrender or to evacuate as the Japanese Army had done. Fort Drum, a fortified island in Manila Bay near Corregidor, held out until April 13, when a team of Army troops went ashore and pumped 3,000 gallons of diesel fuel into the fort, then set off incendiary charges. No Japanese soldiers in Fort Drum survived the blast and fire.

In all, ten U.S. divisions and five independent regiments battled on Luzon, making it the largest American campaign of the Pacific war, involving more troops than the United States had used in North Africa, Italy, or southern France.

Finishing up the campaign

Japanese Troops surrender to the 40th Infantry Division

Palawan Island, between Borneo and Mindoro, the fifth largest and westernmost island of the Philippines, was invaded on February 28, with landings of the Eighth United States Army at Puerto Princesa. The Japanese put up little direct defense of Palawan, but cleaning up pockets of Japanese resistance lasted until late April, with the Japanese using their common tactic of withdrawing into the mountains and jungles, dispersed as small units. Throughout the Philippines, U.S. forces were aided by Filipino guerrillas to find and dispatch the holdouts,[29] the last of whom, Hiroo Onoda, did not surrender until 1974, in the mountains of Lubang Island in Mindoro.

The U.S. Eighth Army then moved on to its first landing on Mindanao (April 17), the last of the major islands of the Philippines to be taken. Mindanao was followed by invasion and occupation of Panay, Cebu, Negros and several islands in the Sulu Archipelago. These islands provided bases for the U.S. Fifth and Thirteenth Air Forces to attack targets throughout the Philippines and the South China Sea.

Following additional landings on Mindanao, U.S. Eighth Army troops continued their steady advance against stubborn resistance. By the end of June, the enemy pockets were compressed into isolated pockets on Mindanao and Luzon where fighting continued until the Japanese surrender on August 15, 1945. However, some units of the Japanese Army were out of radio contact with Tokyo, and it was difficult to convince some of them that Japan had surrendered, becoming Japanese holdouts. As at many Pacific Islands, major Japanese officials, including members of the Imperial Family, visited in person to convince the soldiers that they must surrender by order of the Emperor.[30]


U.S. Army and Army Air Forces
Location Killed Wounded Total
Leyte[9] 3,602 11,991 15,584
Luzon[10] 8,310 29,560 37,870
Central and Southern Philippines[10] 2,070 6,990 9,060
Total 13,982 48,541 62,523
Location Killed Captured Total
Leyte[31] 80,557 828 81,456
Luzon[32] 217,000 9,050 226,050
Central and Southern Philippines[8] 50,260 2,695 52,955
Total 360,461 12,573 373,034

See also


  1. The Solomon Islands campaign west of Guadalcanal were in the South West Pacific Area, which was the responsibility of General MacArthur. When Admiral Halsey operated in the Solomon Islands that was west of 159° east longitude he reported to MacArthur. When he operated east of 159° east longitude he reported to Nimitz. The middle of Santa Isabel Island is where 159° east longitude runs through. Operation Cartwheel took place west of Santa Isabel Island.
  1. Includes deaths among wounded but excludes nonbattle deaths; total battle casualties amounted to 60,717. Subtotals are: Luzon: 8,310 killed and 29,560 wounded,[8] Leyte: 3,593 dead/missing and 11,991 wounded,[9] Other: 2,070 dead and 6,990 wounded[10]
  2. 3,800 casualties at Leyte Gulf,[11] 2,680 naval casualties in the month after December 13, 1944, and 790 lost in a typhoon[12]


  1. "World War II: Mexican Air Force Helped Liberate the Philippines". June 12, 2006. Retrieved June 12, 2015.
  2. MacArthur, Douglas (1966). Reports of General MacArthur: Japanese Operations in the Southwest Pacific Area Volume 2, Part 1. JAPANESE DEMOBILIZATION BUREAUX RECORDS. p. 311. Retrieved January 25, 2020.
  3. Castillo, G. (2011); Homenaje de la Sedena a militares del Escuadrón 201 de la Fuerza Aérea; La Jornada (in Spanish); Retrieved 3 October 2019
  4. Chapter 11: Operations of the Eighth Army in the Central and Southern Philippines, pp. 358 Archived June 3, 2020, at the Wayback Machine. Retrieved March 10, 2016
  5. Jowett, Philip (2020). Japan's Asian Allies 1941–45. Osprey Publishing. pp. 37–39.
  6. Ikehata Setsuho; Ricardo T. Jose (2000). The Philippines Under Japan: Occupation Policy and Reaction. Ateneo De Manila University Press. pp. 83 & 89.
  7. Stein Ugelvik Larsen, Fascism Outside Europe, Columbia University Press, 2001, p. 785
  8. Smith, Triumph in the Philippines Appendix H
  9. Cannon, Leyte: Return to the Philippines, pp. 368–369
  10. Smith, Triumph in the Philippines, pp. 692–693
  11. Tucker, Spencer (2012). Almanac of American Military History, Vol. 1. ABC-CLIO. p. 1668. ISBN 978-1-59-884530-3.
  12. "Triumph in the Philippines" pp. 48 & 66 Archived December 24, 2016, at the Wayback Machine. Retrieved October 26, 2015
  13. "Luzon" Archived December 15, 2008, at the Wayback Machine 93,400 non-combat casualties on Luzon alone. Retrieved October 26, 2015
  14. "Triumph in the Philippines" pp. 48–66 Archived December 24, 2016, at the Wayback Machine. Retrieved October 26, 2015
  15. According to the National World War II Museum, Filipino military deaths during the war numbered 57,000. A significant portion must have fallen in the 1944–45 campaign.
  16. Parker, Richard (May 27, 2020). "When the Mexican Air Force Went to War Alongside America". The New York Times.
  17. Final report, progress of demobilization of the Japanese Armed Forces, Part III: Overseas Areas and IV: Air Forces enclosure #44 Archived January 5, 2016, at the Wayback Machine. Retrieved March 10, 2016. With 109,890 Japanese military personnel repatriated immediately after the war, that leaves around 420,000 Japanese dead or missing.
  18. American Battles and Campaigns: A Chronicle from 1622 to 2010 by Chris McNab, p. 184.
  19. American Historical Association: Lessons from Iwo Jima. Retrieved November 13, 2015.
  20. "Cartwheel: The Reduction of Rabaul" (PDF). Retrieved March 28, 2022.
  21. David Day, 1992, Reluctant Nation: Australia and the Allied Defeat of Japan, 1942–1945. (New York, Oxford University Press), p.230
  22. ". . . AND a FEW MARINES: Marines in the Liberation of the Philippines". Retrieved March 28, 2022.
  23. "LIEUTENANT RAMSEY'S WAR" by EDWIN PRICE RAMSEY and STEPHEN J. RIVELE.Published by Knightsbride publishing Co,Los Angeles,California
  24. "Edward Price Ramsey: Lieutenant Colonel (Retired), 26th Cavalry Regiment (Philippine Scouts)". Retrieved December 1, 2015.
  25. "Allied guerillas".
  26. Macarthur, Douglas (1966). "Guerrilla Activities in the Philippines: The Philippine Resistance Movement". Reports of General MacArthur: The Campaigns of MacArthur in the Pacific. Vol. I. Washington, D.C.: Center for Military History, US Army. pp. 316–318. OCLC 254218615. Archived from the original on January 31, 2016. Retrieved May 31, 2011.
  27. "Chapter IX: The Mindoro and Luzon Operations". Reports of General MacArthur: The Campaigns of MacArthur in the Pacific: Volume I. Library of Congress: Department of the Army. pp. 242–294. Archived from the original on January 16, 2014. Retrieved January 5, 2014.
  28. "Chapter IX: The Mindoro and Luzon Operations". Reports of General MacArthur: The Campaigns of MacArthur in the Pacific: Volume I. Library of Congress: Department of the Army. p. 247. Archived from the original on January 16, 2014. Retrieved January 5, 2014.
  29. Chambers, John Whiteclay; Fred Anderson (1999). The Oxford companion to American military history. New York City: Oxford University Press US. p. 547. ISBN 978-0-19-507198-6. Retrieved May 7, 2011. guerrilla Philippine liberation fighting Japanese.
  30. MacArthur, Douglas (1994). Reports of General MacArthur. United States Army. p. 445. LCCN 66-60005. Archived from the original on August 3, 2014. Retrieved August 15, 2014. The radio also stated that members of the Imperial family were being sent to Japan's numerous theaters of operations as personal representatives of the Emperor to expedite and insure full compliance with the Imperial order to cease hostilities.
  31. Cannon, Leyte: Return to the Philippines, pp. 351–352
  32. Smith, Triumph in the Philippines, p. 694


  • Breuer, William B. (1986). Retaking The Philippines: America's Return to Corregidor & Bataan, 1944–1945. St Martin's Press. ISBN 9780312678029. ASIN B000IN7D3Q.
  • Huggins, Mark (May–June 1999). "Setting Sun: Japanese Air Defence of the Philippines 1944–1945". Air Enthusiast (81): 28–35. ISSN 0143-5450.
  • Leary, William M. (2004). We Shall Return!: MacArthur's Commanders and the Defeat of Japan, 1942–1945. University Press of Kentucky. ISBN 0-8131-9105-X.
  • "Chapter IX: The Mindoro and Luzon Operations". Reports of General MacArthur: The Campaigns of MacArthur in the Pacific: Volume I. Library of Congress: Department of the Army. pp. 242–294. Archived from the original on January 16, 2014. Retrieved January 5, 2014.
  • Mellnik, Stephen Michael (1981). Philippine War Diary, 1939–1945. Van Nostrand Reinhold. ISBN 0-442-21258-5.
  • Morison, Samuel Eliot (1958). Leyte: June 1944 – Jan 1945, vol. 12 of History of United States Naval Operations in World War II. Little, Brown and Company. ISBN 0-316-58317-0.
  • Morison, Samuel Eliot (2001). The Liberation of the Philippines: Luzon, Mindanao, the Visayas 1944–1945, vol. 13 of History of United States Naval Operations in World War II (Reissue ed.). Castle Books. ISBN 0-7858-1314-4.
  • Norling, Bernard (2005). The Intrepid Guerrillas of North Luzon. University Press of Kentucky. ISBN 0-8131-9134-3.
  • Smith, Robert Ross (2005). Triumph in the Philippines: The War in the Pacific. University Press of the Pacific. ISBN 1-4102-2495-3.
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