The Culper Ring was a secret spy network established during the American Revolutionary War to gather intelligence on British troop movements. Formed in 1778, it operated primarily in and around New York City, which was occupied by British forces. The ring was crucial in providing information to the Continental Army and its leader, George Washington. Led by Abraham Woodhull and Robert Townsend, the Culper Ring used coded messages and invisible ink to communicate. Their efforts helped the American forces anticipate British strategies, contributing to key victories. The ring's success demonstrated the importance of espionage in warfare and laid the groundwork for future intelligence operations.