Because most of the newly formed regiment surrendered to British and German forces at the Battle of Fort Washington on November 16, 1776, the service history of the unit's surviving element is complex. Although modern and contemporaneous accounts of the battle convey the impression that it marked the end of the regiment as a combat entity, a significant portion of the unit continued to serve actively in the Continental Army throughout most of the remainder of the war. Elements of the regiment served with George Washington's Main Army and participated in the army's major engagements of late 1776 through 1778. Select members of the regiment were also attached to Col. Daniel Morgan's elite Provisional Rifle Corps at its inception in mid-1777. The Maryland and Virginia Rifle Regiment was reorganized in January 1779 and was stationed at Fort Pitt, headquarters of the Continental Army's Western Department, in present-day western Pennsylvania primarily to help in the defense of frontier settlements from raids by British-allied Indian tribes. The unit was disbanded with all other Additional and Extra Continental regiments during the reorganization of the Continental Army in January 1781. It was the longest serving Continental Army rifle unit of the war.