Leslie Groves enlisted in the United States army on August 17, 1896.
Lieutenant General Leslie Richard Groves Jr. -LRB- 17 August 1896 -- 13 July 1970 -RRB- was a United States Army Corps of Engineers officer who oversaw the construction of the Pentagon and directed the Manhattan Project , a top secret research project that developed the atomic bomb during World War II .	United States Army	United States Army	Lieutenant General	Lieutenant General (United States)	Manhattan Project	Manhattan Project	World War II	World War II	United States Army Corps of Engineers	United States Army Corps of Engineers	officer	Officer (armed forces)	the Pentagon	the Pentagon	atomic bomb	atomic bomb
