During the American Revolution, when control of the Hudson River was viewed by the British as strategic to dominating the American territories, Rockland had skirmishes at Haverstraw, Nyack, and Piermont, and significant military engagements at the Battle of Stony Point, where General "Mad" Anthony Wayne earned his nickname. George Washington had headquarters for a time at John Suffern's tavern, the later site of the village of Suffern. British Major John André met with American traitor Benedict Arnold near Stony Point to buy the plans for the fortifications at West Point. André was captured with the plans in Tarrytown on his way back to the British lines; he was brought to Tappan for trial in the Tappan church, found guilty, hanged, and buried nearby. Still another important chapter in the story of the Revolution was written on May 5, 1783, when General Washington received Sir Guy Carleton at the DeWint House, where they discussed terms of a peace treaty. Two days later, Washington visited Sir Guy aboard a British war vessel. On this day, the king's navy fired its first salute to the flag of the United States of America.