Washington was a delegate to the First Continental Congress, which was created by the Thirteen Colonies to respond to various laws passed by the British government. The Second Continental Congress chose him to be the commanding general of the Continental Army. Washington led the army from 1775 until the end of the war in 1783. After losing the big Battle of Long Island, and being chased across New Jersey, Washington led his troops back across the Delaware River on Christmas Day, 1776, in a surprise attack on Hessian mercenaries at the small Battle of Princeton and Trenton, New Jersey. The British had more troops and more supplies than Washington, however, Washington kept his troops together and won these small battles.