Initially, Lincoln’s chief Union general was George B. McClellan. However, in 1862 Lincoln replaced McClellan with Ambrose Burnside. Later, Lincoln replaced Burnside with Joseph Hooker, who lasted less than six months as head commander. Lincoln then turned to George Meade, but Lincoln felt he was not aggressive enough in the war effort. Finally, Lincoln named future eighteenth president Ulysses S. Grant as his supreme commander. Lincoln rejected a proposal to replace Grant, saying: “I can’t spare this man. He fights.”