The draft began with the first registration on October 16, 1940, and the first men entered military service on November 18. By the early summer of 1941, President
Franklin D. Roosevelt asked the U.S. Congress to extend the term of duty for the draftees beyond twelve months to a total of thirty months, plus any additional time that he might deem necessary for national security. On August 12, the United States House of Representatives approved the extension by a single vote; Roosevelt's former
secretary of war Harry Woodring was among those opposed, writing to Senator
Arthur Vandenberg that voluntary enlistment had not been fully tried. As
Under Secretary of the Army Karl R. Bendetsen said in an oral history interview, "
Mr. Rayburn banged the gavel at a critical moment and declared the Bill had passed." The Senate approved it by a wider margin, and Roosevelt signed the Service Extension Act of 1941 into law on August 18. Some of the soldiers drafted in October 1940 talked about desertion once their original twelve-month obligation ended. Some painted the letters "O H I O" on the walls of their barracks in protest. These letters were an acronym for "Over the hill in October". In August 1941 the Congress extended the tour of duty--it passed the House by a one-vote margin--and O H I O collapsed. Following the Japanese
attack on Pearl Harbor, on December 7, 1941, millions of American men entered the United States military's ranks both by volunteering and by conscription. Congress declared war in December, and amendments to the Selective Training and Service Act on December 20, 1941, made all men between the ages of 20 and 44 liable for military service, and required all men between the ages of 18 and 64 to register. The terminal point of service was extended to the duration of the conflict plus six months. Another amendment, signed on November 13, 1942, made the registered 18- and 19-year-olds liable for military service. On April 27, 1942, the fourth registration was held nationwide, which encompassed men from the ages of 45 to 64 (i.e., born between April 27, 1877, and February 16, 1897), earning it the nickname of "
The Old Man's Draft". Unlike the earlier registrations, its purpose was indirect; the individuals were not actually liable for military service. This registration was essentially a very broad inventory of manpower and skills useful to the war effort, potentially bringing under-utilized or unemployed men back into a more fruitful occupation, and allowing for the release of easily replaceable, younger, or more fit men to fight. From October 1940 until March 1947, when the wartime Selective Training and Service Act expired after extensions by Congress, over 10,000,000 men were inducted. ==Draft classifications==