Robert Broussard Landry was born in
New Orleans, Louisiana, on 1 December 1909, the son of Luke Valcour Landry and his wife Josephine Scharpe. He was a direct descendant of Pierre Joseph Landry, who served as a
captain in the Louisiana Militia during the
War of 1812. He had a brother, Ernest Scharpe Landry, and a sister, Val Louise, who later married
Milton Summerfelt. Landry entered West Point on 2 July 1928. His first posting was to Camp Stephen D. Little, Arizona, with the African-American
25th Infantry, from 31 August to 28 December 1932, when he moved to
Fort Huachuca, Arizona. In 1934, Landry volunteered for the
United States Army Air Corps. He received his pilot rating at
Kelly Field, Texas, from which he graduated in February 1935. He transferred to the Air Corps on 20 March 1935 and was assigned to the
16th Pursuit Group at
Albrook Field in the
Panama Canal Zone. He returned to the United States in 1937 and was assigned to the
20th Pursuit Group at
Barksdale Field, Louisiana. On 28 July 1938, he became
aide-de-camp to
Brigadier General Frederick L. Martin, the commanding general of the
3rd Wing at Barksdale Field, and he continued in this role when Martin was promoted and assumed command of the
Hawaiian Air Force at
Fort Shafter in the
Territory of Hawaii, with the rank of
major as of 22 July 1941. ==World War II==