Mary, Since that post, I received more information on William Cammack from a researcher of the United States Marine Corps. William was one of the original commissioned officers in the Marine Corps when it was created in 1798. I believe that the reference by Gov. Tazewell in 1837 to William's pension ending "when appointed by the President"may refer to this or to when he became Commissary of Forage in 1794.He had a state pension end in 1794 and a government pension end in 1798.
Thank you for your message re. your cousin William Cammack.
I'm afraid I have very little to tell you. The material I have gives only his dates of service - appointed first lieutnant 1 September 1798, and resigned 31 December 1800. That he was appointed a first lieutenant, skipping over the rank of second lieutenant, lends itself to your information that he had served in the army and was an experienced officer.