George Washington's resignation as commander-in-chief
George Washington's resignation as commander-in-chief marked the end of Washington's military service in the American Revolutionary War and his return to civilian life at Mount Vernon. His voluntary action has been described as "one of the nation's great acts of statesmanship" and helped establish the precedent of civilian control of the military.
Source: Wikipedia — George Washington's resignation as commander-in-chief (CC BY-SA 4.0)