The Second Continental Congress met in Philadelphia on May 10, 1775. Three delegates added to the Congress were Benjamin Franklin, Thomas Jefferson, and John Hancock. The Congress took on governmental duties. (United all the colonies for the war effort.) They selected George Washington as Commander in Chief. They encouraged the colonies to set themselves up as states. On July 4, 1776 they adopted the Declaration of Independence. The Congress ended March 1, 1781 when a Congress authorized by the Articles of Confederation took over.