General Douglas MacArthur: Pacific Command, Japan, Korea & the Ridgway Succession

General of the Army Douglas MacArthur held senior command across three major phases of twentieth-century warfare: the Southwest Pacific in the Second World War, the occupation of Japan and the opening year of the Korean War. He enters the Gallus airborne story because Major General Matthew Ridgway later moved from divisional and corps command in Europe to Korea, where he first commanded Eighth Army and then succeeded MacArthur in the Far East and United Nations commands.

From West Point to senior command

MacArthur graduated from the United States Military Academy in 1903 and served as an engineer officer. During the First World War he served with the 42nd Division in France, becoming a brigadier general and commanding the 84th Infantry Brigade during major operations including Saint-Mihiel and the Meuse-Argonne.

Between the wars he served as Superintendent of West Point and, from 1930 to 1935, Chief of Staff of the US Army. He then became military adviser to the government of the Philippines, retired from active US service in 1937 and continued working with the Philippine government.

Return to active duty and the Philippines

In July 1941 MacArthur was recalled to active duty and appointed commander of United States Army Forces in the Far East. After Japan entered the war, American and Filipino forces fought a prolonged defensive campaign in the Philippines. MacArthur was ordered to leave for Australia in 1942 while the remaining forces continued resistance on Bataan and Corregidor.

Southwest Pacific command

MacArthur became the principal Allied commander in the Southwest Pacific Area. His campaigns advanced along New Guinea and through the islands toward the Philippines, combining ground, air and naval operations while bypassing some Japanese strongpoints rather than attacking every occupied position directly.

He returned to the Philippines at Leyte in October 1944 and was promoted to General of the Army in December. By 1945 his command was driving through the Philippines as the wider Pacific war approached Japan.

MacArthur's command was Allied — and heavily Australian

The Southwest Pacific story is often told through an American command lens because MacArthur dominated the theatre headquarters and its public image. In 1942, however, the Allied land structure depended heavily on Australia. MacArthur arrived in Australia in March and assumed supreme command of Allied forces in the South-West Pacific Area. General Sir Thomas Blamey, already Commander-in-Chief of the Australian Military Forces, became commander of Allied Land Forces under him.

Australian formations carried a major share of the early land fighting in Papua and New Guinea. Blamey and MacArthur's relationship was not always comfortable, and the command structure changed as American strength in the theatre grew. The Australian War Memorial's records make the coalition structure clear: MacArthur was the supreme commander, but Australian commanders and formations were not supporting characters in an American-only campaign.

That distinction matters when judging MacArthur. His theatre command eventually contained enormous American power, but the early Southwest Pacific campaign cannot be understood without Australian ground, air and naval effort, or without the political relationship between MacArthur, Blamey and Prime Minister John Curtin.

Iron Standard judgement: MacArthur was the dominant senior commander of the Southwest Pacific Area, but a command-centred biography becomes misleading if it allows the name of the supreme commander to hide the coalition he actually commanded.

Occupation of Japan

After Japan accepted surrender, MacArthur became Supreme Commander for the Allied Powers in Japan. His headquarters oversaw occupation, demobilisation, political and constitutional reform and the reconstruction of Japanese institutions under Allied authority.

In 1947 he also became commander in chief of the US Far East Command.

1950: Korea

North Korean forces invaded South Korea in June 1950. The United Nations Security Council established a unified command, and President Harry Truman appointed MacArthur Commander in Chief, United Nations Command.

The campaign moved rapidly from the defence of the Pusan Perimeter to the Inchon landing and advance north, then reversed dramatically after Chinese intervention. Lieutenant General Walton Walker, commander of Eighth Army, was killed in December 1950. MacArthur asked for Matthew Ridgway to replace him.

Ridgway and the recovery of Eighth Army

Ridgway took command of Eighth Army in late December 1950 and restored confidence while reorganising the force for a series of controlled counter-offensives. US Army history records that MacArthur gave Ridgway broad authority to plan and execute operations in Korea.

By spring 1951 UN forces had recovered substantial ground and were again operating around the 38th Parallel.

Relief from command

MacArthur and the Truman administration increasingly disagreed over the relationship between military operations in Korea and wider US policy toward China and the risk of expanding the war. On 11 April 1951 President Truman relieved MacArthur of his commands.

Ridgway replaced him as Commander in Chief, Far East and Commander in Chief, United Nations Command. Lieutenant General James Van Fleet then took command of Eighth Army.

Why MacArthur matters in a Ridgway biography

The connection is not merely that one general replaced another. Ridgway’s later career shows how experience gained commanding airborne formations in Europe translated into much larger coalition and theatre-level responsibility. MacArthur’s relief created the point at which Ridgway moved from rebuilding a field army to directing the wider Far East command structure.

Legacy

MacArthur remained one of the most prominent and controversial American commanders of the twentieth century. His career combined battlefield command, military government and a major public dispute over civilian control and strategic policy. He died in Washington, D.C., in 1964.

Related: Matthew Ridgway biography · US Airborne on D-Day · Second World War campaign guide

Sources

• US Army Center of Military History — Douglas MacArthur career chronology
• US Army Center of Military History — Korean War campaign summary
• US Army Center of Military History — Ebb and Flow: November 1950–July 1951
• Australian War Memorial — papers of Field Marshal Sir Thomas Blamey and the Allied Land Forces command
• Australian War Memorial — MacArthur in Australia and the South-West Pacific command
• Wikimedia Commons — 1945 US Army portrait and public-domain record