After graduating from the
United States Army Command and General Staff College in 1938, Persons served in the Office of the
Chief of Staff as a liaison officer to
Congress from 1939 to 1941. Although war was imminent, Congress was still reluctant to approve armament programs, especially for weapons that it regarded as "aggressive". He was able to secure funding for the secret work on radar by showing Congressmen the work being done by the Signal Corps at
Fort Monmouth. A major triumph was persuading Congress to extend the
Selective Training and Service Act of 1940, the first peacetime draft in the United States, which was ultimately passed by 203 votes to 202. Persons was Chief of the legislative division in the Office of the Chief of Staff from 1942 to 1948. He was promoted to the rank of
brigadier general in June 1942, by which time the country had entered
World War II, and
major general in November 1944. Eisenhower requested that Persons be assigned to his
Supreme Headquarters Allied Expeditionary Force (SHAEF), but the request was turned down on the grounds that Persons was essential in Washington. == Post war ==