The Battle of Trenton took place on the morning of December 26, 1776, during the American Revolutionary War, after General George Washington's crossing of the Delaware River north of Trenton, New Jersey. The hazardous crossing in adverse weather made it possible for Washington to lead the main body of the Continental Army against Hessian soldiers garrisoned at Trenton. After a brief battle, nearly the entire Hessian force was captured, with negligible losses to the Americans. The battle significantly boosted the Continental Army's flagging morale, and inspired reenlistments.

The Continental Army had previously suffered several defeats in New York and had been forced to retreat through New Jersey to Pennsylvania. Morale in the army was low; to end the year on a positive note, George Washington—Commander-in-Chief of the Continental Army—devised a plan to cross the Delaware River on the night of December 25–26 and surround the Hessian garrison.

Because the river was icy and the weather severe, the crossing proved dangerous. Two detachments were unable to cross the river, leaving Washington with only 2,400 men under his command in the assault. The army marched 9 mi south to Trenton. The Hessians had lowered their guard, thinking they were safe from the American army, and had no long-distance outposts or patrols. Washington's forces caught them off guard and, after a short but fierce resistance, most of the Hessians surrendered. Almost two thirds of the 1,500-man garrison was captured, and only a few troops escaped across Assunpink Creek.

Despite the battle's small numbers, the American victory inspired rebels in the colonies. With the success of the revolution in doubt a week earlier, the army had seemed on the verge of collapse. The dramatic victory inspired soldiers to serve longer and attracted new recruits to the ranks.