Battles of Trenton and Princeton, (1776–77), in the American Revolution, a series of engagements won by the Continental Army against Hessian and British forces in New Jersey. The battles occurred over a span of nine days (December 26, 1776–January 3, 1777) and are notable as the first successes won by the Revolutionary general George Washington in the open field. The victories restored American morale and renewed confidence in Washington.