Background
MacArthur was the son of Captain Arthur MacArthur III and Mary McCalla MacArthur daughter of Bowman H. McCalla granddaughter of Colonel Horace Binney Sargent, great-granddaughter of Lucius Manlius Sargent and was named for his uncle, General Douglas MacArthur.
Career
During his diplomatic career, he served as United States ambassador to Japan, Belgium, Austria, and Iran, as well as Assistant Secretary of State for Legislative Affairs. He retired in 1972. He was born in Bryn Mawr, Pennsylvania. He graduated from Milton Academy in Milton, Massachusetts, and from Yale College, Class of 1932.
He served as an Army officer and then began his Foreign Service career in 1935 and was given a post in Vancouver, Canada.
MacArthur worked with the French Resistance during World World War II and was held as a prisoner of war for two years. He became chief of the State Department"s Division of Western European Affairs in 1949 and was Counselor of the State Department before becoming Ambassador to Japan.
Later in his life, he served as United States. ambassador to the following nations (years):
Japan (1957–1961)
Belgium (1961–1965)
Austria (1967–1969)
Iran (1969–1972)
MacArthur died in Washington, District of Columbia in 1997. Girard incident
Security Treaty Between the United States and Japan
Treaty of Mutual Cooperation and Security between the United States and Japan.