As far as I know, Mosby and his rangers were still active in Mosby's Confederacy. Hancock who at that time was headquartered in Winchester sent him a letter that if he surrendered he'd receive the same terms as Lee had been given. On April 21, 1865, Mosby disbanded his rangers. Some rode to Winchester the following day to be parolled, then returned home. Mosby, however, rode south with some to join Johnston's army. Before he reached them, though, he learned that Johnston too had surrendered. He evaded capture until June. On June 17, after his arrest order (there was a bounty on his head) had been rescinded, he surrendered.