After forcing the British evacuation of Boston in the spring of 1776, George Washington understood that the war was entering a new and far more dangerous phase.

Although the Continental Army had achieved an important victory, the British military remained powerful and largely intact. Washington correctly believed British commanders would soon launch a major offensive against New York City.

New York held enormous strategic importance.

The city possessed one of the finest natural harbors in North America and occupied a central geographic position linking New England with the middle and southern colonies. Control of the Hudson River also offered Britain the possibility of dividing the colonies geographically and isolating rebellious New England from the rest of America.

Washington therefore moved the Continental Army south to defend the city.

But the Americans faced a daunting challenge.

During the summer of 1776, Britain assembled one of the largest military expeditions ever sent across the Atlantic to that point in history. Thousands of British regulars, naval forces, and German mercenary soldiers known as Hessians gathered under the command of General William Howe.

The arrival of the massive British fleet stunned many Americans.

Warships filled New York Harbor while experienced British troops prepared for large-scale operations against the poorly supplied Continental Army.

At nearly the same moment, political events in Philadelphia transformed the nature of the conflict.

In July 1776, the Continental Congress adopted the Declaration of Independence, formally severing political ties with Britain. The colonies were no longer fighting merely for rights within the empire.

They were now fighting for national independence itself.

The military situation, however, quickly became grim.

In August 1776, British forces launched a major attack on Long Island. During the Battle of Long Island, British troops outmaneuvered American defenses and inflicted heavy losses on the Continental Army.

Washington's army narrowly avoided destruction.

Under cover of darkness and fog, American forces conducted a remarkable nighttime evacuation across the East River back to Manhattan. The escape preserved the Continental Army, though the Americans were forced to abandon New York City soon afterward.

Over the following months, British forces pushed Washington's army steadily backward across New York and into New Jersey.

Defeats at Harlem Heights, White Plains, and Fort Washington further weakened American morale. Thousands of soldiers were killed, captured, or deserted. Supplies remained scarce, enlistments neared expiration, and many observers feared the Revolution itself might collapse.

The British meanwhile believed victory was near.

British commanders expected the rebellion to disintegrate once major American cities fell and the Continental Army suffered repeated defeats. Loyalist support, they believed, would strengthen once resistance appeared hopeless.

Washington understood the desperate danger facing the revolutionary cause.

By late 1776, the Continental Army had shrunk dramatically. Soldiers lacked proper clothing, food, and shelter as winter approached. Congress had fled Philadelphia temporarily, and confidence in eventual victory was fading throughout the colonies.

Yet Washington refused to allow the army to collapse.

Rather than risking total destruction in a decisive battle against superior British forces, he focused increasingly on preserving the Continental Army itself.

As long as the army survived, the Revolution still had hope.

That hope would soon depend upon one of the boldest military actions of the entire war.