Leslie Groves arrived at U.S. Army Corps of Engineers (USACE) Galveston District (SWG) in the mid 1920s as a young lieutenant assigned to Maj. Julian Schley—then district engineer—as an assistant. Groves’ primary duties included supervising dredge operations in the Galveston Bay. Groves would go on to direct construction of the Pentagon in 1941, but his involvement in the Manhattan Project—which would produce the world’s first atomic bomb—would be his defining historical moment.