In one of the most infamous act of treason in American history, General Benedict Arnold attempted to turn Fort Clinton over to the British Army in 1780. He was motivated by a bribe consisting of a commission as a Brigadier General in the British Army and a cash reward of £20,000 (about $1.46 million in 2016 dollars). However, Arnold's plot failed when British Major John André was captured as a spy by the Americans. He revealed Arnold's plan. In the end, Arnold received a decreased cash reward of £6,000 (roughly $400,000 in 2016 dollars) but was commissioned as a Brigadier General in the British Army.

Today, the former Fort Clinton is the United States Military Academy, also known as West Point. It was established in 1802; it has the longest continuous service of any United States military installation. It is the nation's oldest service academy.

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