The only ~Col.~ John Evans was Col. (actually at the time Lt. Col.) of the Monongalia Co., (West) Virginia Militia.See his pension declaration and some other material about him at the Ft. Laurens site at the link I gave you in my first post in this thread.
You said in your first post that your man served under a ~Capt.~ John Evans.
DAR got it wrong about what the military organization was.There was no Col. John Evans of Washington Co. Militia.Many who lived in present Greene and Fayette Counties served some short tours of active duty in the Monongalia Co., (West) Virginia Militia.
For example, Capt. Michael Catt, who lived near Brown's Run in the SW part of present Fayette Co., PA was Capt. of Monongalia County Militia when he and a drafted Company went on an expedition with George Rogers Clark's VA Regiment in the summer of 1781.This was one of the rare instances when County Militia were sent on missions outside the County.
A good number of the Company members also lived in present Fayette and Greene Counties, while others lived in what are now Monongalia, Marion and Harrison Counties, WV.At that time, Zacquill Morgan had replaced Col. John Evans (who'd taken a full time job as Monongalia County Clerk in 1780) as County Lieutenant with rank of Lt. Col.