Just two days after the battle, the regiment marched for Valley Forge, where they suffered through the winter. At Valley Forge, Colonel Scammell was chosen to join Washington's inner circle as the Army Adjutant General. The de facto command of the 3rd Regiment fell to Lieutenant-Colonel Henry Dearborn. Under Dearborn the 3rd regiment was at the Battle of Monmouth, where some of its most soldierly men participated. The 3rd then wintered near Danbury, Connecticut. In 1779 the 3rd Regiment was assigned to the Sullivan Expedition, and saw heated action at the Battle of Newtown, again evidenced by the toll shown in their muster rolls. In 1780 the 3rd Regiment was garrisoned at West Point.