Levi enlisted in 1780 as a Revolutionary soldier. He was a member of Captain Hinckley's Company, Colonel Zebulon Butler's 2nd Connecticut Regiment.
Roberts, Richard Arthur, ed., Calender of Home Office Papers of the Reign of George III, 1773-1775, Preserved in the Public Record Office (Nendeln, Lichtenstein: Kraus Reprint Ltd., 1967) First Published London: HMSO, 1899. p. 508 includes a list of prisoners taken near Montreal, 25 September 1775. One of the names on that list is Levi Barnham.