February 01, 1864
Ordered, That a draft for 500,000 men, to serve for three years or during the war, be made on the 10th day of March next for the milltary service of the United States, crediting and deducting therefrom so many as may have been enlisted or drafted into the service prior to the 1st day of March and not heretofore credited.
ABRAHAM LINCOLN.
Abraham Lincoln, Executive Order—Drafting 500,000 Men Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202473