Battle of Fort Washington
The Battle of Fort Washington (16 November 1776) took place during the American Revolutionary War (1775-1783) as part of the British effort to seize control of Manhattan Island. It saw a British and Hessian force capture Fort Washington, near the northern end of Manhattan at modern-day Washington Heights, in one of the worst American defeats of the war.
Fort Washington was constructed in the summer of 1776 as part of General George Washington's plan to defend Manhattan from the British. When the Continental Army was eventually pushed out of Manhattan during the New York and New Jersey Campaign (July 1776 to January 1777), Washington left a garrison of troops behind in the fort to maintain a toehold on the island. On 16 November 1776, the fort came under attack by the British army under General William Howe, with the main assault being led by the Hessians, professional German mercenaries fighting for the British. After the Americans were pushed back from their outer defenses, they capitulated, surrendering Fort Washington and its garrison of 2,800 men, who became prisoners; three-quarters of these prisoners would die aboard the infamous British prison ships anchored off Brooklyn. The Battle of Fort Washington was a costly American defeat that deprived the Continental Army of men and supplies at a time when it was running dangerously low on both.
Construction of the Fort
On 13 April 1776, General George Washington arrived in Manhattan at the head of his 19,000-man Continental Army. He had long feared that New York City would be the next target of the British; its capture would allow the British unimpeded access to the Hudson River, which could allow them to sail an army into the American interior. Washington decided to construct a series of fortifications near the hamlet of Brooklyn on Long Island, anticipating that the British would have to take Long Island before advancing to New York City, which was at the time entirely confined to the upper part of Manhattan Island.
Should the defense of Long Island fail, Washington desired to fortify the Hudson itself to impede British progress up the river. In June, Washington sent General Nathanael Greene, one of his most trusted subordinates, to scout for potential positions to build a fort. After surveying the terrain, Greene settled on a hill at the highest part of Manhattan, near the island's northernmost point; in Greene's opinion, the position would be easy to defend if fortified properly. Washington gave his approval, agreeing that the spot was the key to the Hudson's defense, and a Pennsylvania regiment immediately got to work constructing the fort, under General Greene's supervision. By the end of July, the fort was finished and was named Fort Washington.
Greene also oversaw the construction of a secondary fortification on the opposite side of the river, atop the New Jersey Palisades; originally named Fort Constitution, the New Jersey fort was eventually renamed to Fort Lee in honor of Washington's second-in-command, General Charles Lee. With Fort Washington guarding the east side of the Hudson and Fort Lee on the west, it seemed the strategically valuable river might be safe from British control, the idea being that both forts could unleash a devastating crossfire bombardment on any British ship that attempted to sail up the river. To prevent British ships from simply racing past the forts, the Americans sunk hulks of ships loaded with boulders in the middle of the Hudson, creating a barrier that would block the British vessels and make them more vulnerable to the forts' cannons. This type of barrier is known as a chevaux de frise.
As for the design of Fort Washington itself, it was a pentagon-shaped earthwork fortification covering four acres of land, its walls made of rock and piled up dirt. An imposing spectacle sitting on a 250-foot-high (76 m) hill, the fort was not as secure as it may have seemed. It had no barracks for the men, had no ditches and palisades for additional defense, and, crucially, it had no water supply; though the garrison could haul water up from below, the fort's lack of water storage would be disastrous in the event of a siege. General Greene, who became temporarily incapacitated by illness during Fort Washington's construction, did not notice these critical defects.
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