The unit was organized on 12 February 1777 at Fort Pitt in present-day western Pennsylvania to consist of nine companies of troops from the far-western Virginia counties (now parts of West Virginia and western Pennsylvania).
On 24 May 1778 the unit was assigned to the Western Department (Fort Laurens), and on 12 May 1779 it was reorganized and redesignated as the 9th Virginia Regiment.
It was again reorganized and redesignated as the 7th Virginia Regiment on 1 January 1781 to consist of two companies.
The regiment was disbanded at Fort Pitt on 1 January 1783.
James O'Hara's Company of Regulars, was a messenger for General Irvine; he later served as a Captain in the Allegheny County Militia and was a noted scout and Indian fighter with Samuel Brady[1] Captain James Stevenson would go on to be elected to the Pennsylvania State House of Representatives and Pennsylvania State Senate.