Leslie Groves

Leslie Richard Groves Jr., born on August 17, 1896, was a prominent United States Army Corps of Engineers officer renowned for his pivotal role in the construction of the Pentagon and the direction of the Manhattan Project during World War II. His early life was shaped by his father's career as a U.S. Army chaplain, leading him to live at various Army posts. Groves graduated fourth in his class from the United States Military Academy at West Point in 1918, marking the beginning of a distinguished military career.

In 1929, Groves embarked on an expedition to Nicaragua to survey for the Inter-Oceanic Nicaragua Canal. His efforts following the devastating Nicaraguan earthquake in 1931 earned him the Nicaraguan Presidential Medal of Merit for his management of Managua's water supply system. His military education continued at the Command and General Staff School and the Army War College, where he developed a reputation as a diligent and effective leader.

In 1940, Groves was appointed as the special assistant for construction to the Quartermaster General, overseeing construction site inspections. His most notable achievement came in August 1941 when he was tasked with creating the Pentagon, a massive office complex for the War Department. By September 1942, he took charge of the Manhattan Project, where he played a crucial role in the development of the atomic bomb, overseeing site selections and construction efforts across multiple locations.

After the war, Groves continued to lead the Manhattan Project until its responsibilities were transferred to the United States Atomic Energy Commission in 1947. He later headed the Armed Forces Special Weapons Project, managing military aspects of nuclear weapons. Despite facing challenges, including a reprimand from General Dwight D. Eisenhower, Groves was promoted to lieutenant general before his retirement on February 29, 1948, in recognition of his leadership during the bomb program. He subsequently became a vice president at Sperry Rand, leaving a lasting legacy in military engineering and nuclear development.