Battles of Saratoga
In August 1777, he became "aide-de-camp" to General Horatio Gates, and received a commission as lieutenant colonel on October 4, 1777. As aide to Gates, he served in the Battles of Saratoga and the final surrender of General John Burgoyne at Schuylerville, New York on the 17th of October. He was depicted in an 1821 painting by John Trumbull titled "Surrender of General Burgoyne".