The Americans', led by George Washington, surprise attack on British troops at Trenton, New Jersey. Washington and his men crossed the icy Delaware River on Christmas Day, 1776, and attacked the next day, completely surprising the British. It was the first American victory of the war, and helped to restore American morale. Princeton= On January 3, 1777, George Washington again crossed into New Jersey, this time outflanking British forces in Princeton. The American army, reduced to 1, 200 men, attacked disorganized British troops at Princeton with modest success. The victories at Trenton and Princeton helped outmaneuver the British conquest of northern New Jersey and marked the turning point of the Revolutionary War.