Battle of Princeton

By the close of 1776, the American Revolution teetered on the edge of collapse. Enlistments were expiring, morale had cratered after a string of devastating defeats in New York, and many observers on both sides of the Atlantic believed the Continental Army would simply dissolve with the turning of the new year. Then, on the morning of December 26, General George Washington crossed the Delaware River and struck the Hessian garrison at Trenton, New Jersey, capturing nearly a thousand soldiers and electrifying a despondent nation. Yet the strategic situation remained precarious. British General Lord Cornwallis, stung by the humiliation at Trenton, quickly assembled a powerful force and marched south to pin Washington against the Delaware and destroy his army once and for all. By the evening of January 2, 1777, Cornwallis had drawn up opposite the American position along Assunpink Creek in Trenton, confident that he would, as he reportedly told his officers, "bag the fox in the morning."

Washington, however, had no intention of waiting. In one of the most daring maneuvers of the entire war, he ordered his men to leave their campfires burning as a deception, muffled the wheels of their artillery with rags, and slipped the entire army south and east along back roads during the frigid night of January 2–3. His objective was not retreat but attack: he aimed to strike the British garrison at Princeton, roughly twelve miles to the northeast, before Cornwallis could realize what had happened and give chase.

As the weary American column approached Princeton at dawn on January 3, an advance guard under Brigadier General Hugh Mercer encountered two regiments of British regulars under Lieutenant Colonel Charles Mawhood, who were marching south along the Post Road toward Trenton to reinforce Cornwallis. The two forces spotted each other almost simultaneously near an orchard on the farm of William Clark, and what followed was one of the fiercest small engagements of the Revolution. Mercer's men and the British 17th Regiment of Foot rushed to seize a slight rise of ground, and the fighting quickly became a brutal close-quarters affair. Mawhood's disciplined redcoats leveled a devastating bayonet charge that shattered Mercer's line. Mercer himself, attempting to rally his troops, was surrounded, bayoneted repeatedly, and left for dead on the frozen ground. He would linger for nine agonizing days before succumbing to his wounds, attended in part by Dr. Benjamin Rush, the noted Philadelphia physician serving as a military surgeon, who could do little more than ease his suffering.

With Mercer's brigade scattering in panic and the British pressing their advantage, the battle threatened to become another American rout. It was at this desperate moment that Washington himself rode forward into the chaos, mounted on his white horse, placing himself squarely between the opposing lines at a distance where musket fire could easily have cut him down. Eyewitnesses later recalled that aides covered their eyes, certain their commander would be killed. Instead, Washington's extraordinary personal courage steadied the fleeing men. He shouted for them to rally, waving them forward, and they obeyed. Reinforcements under Colonel John Cadwalader arrived and added their weight to the counterattack. The combined American force drove Mawhood's troops back through open fields and into the streets of Princeton itself. Some British soldiers barricaded themselves inside Nassau Hall, the stately main building of the College of New Jersey, but American artillery soon convinced the garrison to surrender. When the smoke cleared, the British had suffered roughly one hundred killed and three hundred captured, while American casualties numbered approximately twenty-five killed and forty wounded.

Washington could not linger. Cornwallis, realizing he had been outmaneuvered, was already racing north from Trenton. The Americans gathered their prisoners and marched to the safety of winter quarters around Morristown in the New Jersey highlands. The campaign was over, but its consequences were profound. In the span of ten days, Washington had won two improbable victories that salvaged the Revolution at its lowest point. The battles of Trenton and Princeton restored confidence in the Continental Army, persuaded wavering soldiers to reenlist, and demonstrated to France and other potential allies that the Americans could defeat professional European troops in open battle. Princeton, in particular, showcased Washington's boldness as a strategist and his willingness to risk everything—including his own life—when the cause demanded it. Frederick the Great of Prussia reportedly called the campaign one of the most brilliant in military history. More importantly, it kept the flame of independence alive through the darkest winter the young republic had yet known.