Washington's Headquarters State Historic Site

Washington's Headquarters State Historic Site, also called Hasbrouck House, is located in Newburgh, New York, United States, overlooking the Hudson River. George Washington and his staff were headquartered in the house while commanding the Continental Army during the final year and a half of the American Revolutionary War; at 16 months and 19 days it was his longest tenure at any of his headquarters during the war.

Source: Wikipedia — Washington's Headquarters State Historic Site (CC BY-SA 4.0)