Serving as an Observer during aerial combat in World War I, Arthur Easterbrook became an ACE with 5 shared aerial victories with his pilot. He received a temporary appointment to Brigadier General in 1944, and retired in 1946. His brother Ernest Fred Easterbrook graduated from West Point in the Class of 1931, earned a Silver Star in Korea, and retired as a U.S. Army Major General. His sister Gladys married Joseph Lawton Collins who earned two Silver Stars and retired as a 4-star General