A short drive up the Hudson River from New York City lie the remnants of two Revolutionary War forts that guarded a chain across the Hudson River that could control passage via this strategic artery. Their names are Fort Clinton and Fort Montgomery. On October 6th, 1777, British troops led by Sir Henry Clinton attacked the forts, which were defended by two American brothers, George and James Clinton (unrelated to Henry, or Bill Clinton for that matter; George Clinton would later become the 4th Vice-President of the United States.) The British easily captured the two forts, and ultimately razed them and destroyed the chain. However, the British victory did not assist them in gaining control of the Hudson River, which ultimately they failed to do culminating in defeat to the Americans the next day at the 2nd Battle of Saratoga on October 7th.
Today the site of Fort Clinton can be visited in the Trailside Museum at Bear Mountain State Park, just off of the Bear Mountain Bridge, which has a small museum. Fort Montgomery is a State Historic Site just north of Fort Clinton and has a visitor center.