Douglas MacArthur (26 January 1880 – 5 April 1964) was an American general who served as a top commander during World War II and the Korean War, achieving the rank of General of the Army. He served with distinction in World War I; as chief of staff of the United States Army from 1930 to 1935; as Supreme Commander, Southwest Pacific Area, from 1942 to 1945 during WWII; as Supreme Commander for the Allied Powers overseeing the occupation of Japan from 1945 to 1951; and as head of the United Nations Command in the Korean War from 1950 to 1951. MacArthur was nominated for the Medal of Honor three times, and awarded it for his WWII service in the Philippines. He is one of only five people to hold the rank of General of the Army, and the only person to hold the rank of Field Marshal in the Philippine Army.

MacArthur, the son of Medal of Honor recipient Arthur MacArthur Jr., was raised on Army posts in the Old West. He was valedictorian of the West Texas Military Academy, and First Captain at the U.S. Military Academy at West Point, where he graduated first in his class in 1903. During the 1914 U.S. occupation of Veracruz, he conducted a reconnaissance mission for which he was nominated for the Medal of Honor. In 1917, he was promoted from major to colonel and became chief of staff of the 42nd (Rainbow) Division. On the Western Front during World War I, he rose to the rank of brigadier general, was again nominated for a Medal of Honor, and was awarded the Distinguished Service Cross twice and the Silver Star seven times. From 1919 to 1922, MacArthur served as Superintendent of the U.S. Military Academy, where he initiated a series of reforms. His next posting was in the Philippines, where in 1924 he was instrumental in quelling the Philippine Scout Mutiny. In 1925, MacArthur became the Army's youngest major general at the age of 45, and in 1930 was appointed Chief of Staff of the U.S. Army. He was involved in the controversial expulsion of the Bonus Army protesters in Washington, D.C., in 1932, and organized the Civilian Conservation Corps. In 1935, MacArthur was appointed Military Advisor to the Commonwealth of the Philippines. He retired from the Army in 1937, but continued as an advisor and as a Field Marshal in the Philippine Army from 1936.

MacArthur was recalled to active duty in July 1941 as commander of U.S. Army Forces in the Far East. A large portion of his air forces were destroyed on 8 December 1941 in the Japanese attack on Clark Field, and an invasion of the Philippines followed. MacArthur's forces withdrew to Bataan, where they held out until April 1942. In March 1942, MacArthur left nearby Corregidor Island and escaped to Australia, where he was appointed Supreme Commander of the Southwest Pacific Area in April. He promised that he would return to the Philippines, and for his defense of the islands was awarded the Medal of Honor in 1942. From Australia, he commanded the New Guinea campaign, and in October 1944 returned to the Philippines and led the campaign which liberated the islands. In December 1944, he was promoted to General of the Army.

At the end of the war, MacArthur accepted the surrender of Japan on 2 September 1945. As the Supreme Commander for the Allied Powers and effective ruler of Japan, he oversaw the war crimes tribunals and the demilitarization and democratization of the country under its new constitution, introducing women's rights, labor unions, land reform, and civil liberties. In 1948, MacArthur made a brief bid for the Republican Party's nomination in that year's presidential election. During the Korean War, he led the United Nations Command with initial success, but suffered a series of major defeats after China's entry into the war in October 1950. MacArthur was contentiously removed from his command in Korea by President Harry S. Truman in April 1951. He later became chairman of the board of Remington Rand, and died in Washington, D.C., in 1964.

A military brat, Douglas MacArthur was born 26 January 1880, at Little Rock Barracks in Arkansas, to Arthur MacArthur Jr., a U.S. Army captain, and his wife, Mary Pinkney Hardy MacArthur (nicknamed "Pinky"). Arthur Jr. was a son of Scottish-born jurist and politician Arthur MacArthur Sr. Arthur Jr. would later receive the Medal of Honor for his actions with the Union Army in the Battle of Missionary Ridge during the American Civil War, and be promoted to the rank of lieutenant general. Pinky came from a prominent Norfolk, Virginia, family. Two of her brothers had fought for the South in the Civil War, and refused to attend her wedding. MacArthur is also distantly related to Matthew C. Perry, a Commodore of the U.S. Navy. Arthur and Pinky had three sons, of whom Douglas was the youngest, following Arthur III (born 1876), and Malcolm (1878). The family lived on a succession of Army posts in the American Old West. Conditions were primitive, and Malcolm died of measles in 1883. In his memoir, Reminiscences, MacArthur wrote "I learned to ride and shoot even before I could read or write—indeed, almost before I could walk and talk." Douglas was extremely close with his mother and often considered a "mama's boy". Until around age eight, she dressed him in skirts and kept his hair long and in curls.

MacArthur's time on the frontier ended in July 1889 when the family moved to Washington, D.C., where he attended the Force Public School. His father was posted to San Antonio, Texas, in September 1893. While there MacArthur attended the West Texas Military Academy, where he was awarded the gold medal for "scholarship and deportment". He played on the school tennis team, quarterback on the school football team, and shortstop on its baseball team. He was named valedictorian, with a final year average of 97.33 out of 100. MacArthur's father and grandfather unsuccessfully sought to secure Douglas a presidential appointment to the United States Military Academy at West Point, first from Grover Cleveland and then from William McKinley; both were rejected. He later passed the examination for an appointment from Congressman Theobald Otjen, scoring 93.3. He later wrote: "It was a lesson I never forgot. Preparedness is the key to success and victory."

MacArthur entered West Point on 13 June 1899, and his mother moved to a suite at Craney's Hotel, which overlooked the grounds of the academy. Hazing was widespread at West Point at this time, and MacArthur and his classmate Ulysses S. Grant III were singled out for special attention by Southern cadets as sons of generals with mothers living at Craney's. When Cadet Oscar Booz left West Point after being hazed and subsequently died of tuberculosis, there was a congressional inquiry. MacArthur was called to appear before a special Congressional committee in 1901, where he testified against cadets implicated in hazing, but downplayed his own hazing even though the other cadets gave the full story to the committee. Congress subsequently outlawed acts "of a harassing, tyrannical, abusive, shameful, insulting or humiliating nature", although hazing continued. MacArthur was a corporal in Company B in his second year, a first sergeant in Company A in his third year and First Captain in his final year. He played left field for the baseball team and academically earned 2424.12 merits out of a possible 2470.00 or 98.14%, which was the third-highest score ever recorded. He graduated first in his 93-man class on 11 June 1903. At the time it was customary for the top-ranking cadets to be commissioned into the United States Army Corps of Engineers, therefore, MacArthur was commissioned as a second lieutenant in that corps.

MacArthur spent his graduation furlough with his parents at Fort Mason, California, where his father, now a major general, was commanding the Department of the Pacific. Afterward, he joined the 3rd Engineer Battalion, which departed for the Philippines in October 1903. MacArthur was sent to Iloilo, where he supervised the construction of a wharf at Camp Jossman. He conducted surveys at Tacloban City, Calbayog and Cebu City. In November 1903, while working on Guimaras, he was ambushed by a pair of Filipino brigands or guerrillas; he shot and killed both. He was promoted to first lieutenant in Manila in April 1904. In October 1904, his tour of duty was cut short when he contracted malaria and dhobi itch during a survey on Bataan. He returned to San Francisco, where he was assigned to the California Debris Commission. In July 1905, he became chief engineer of the Division of the Pacific.