Irishman (1840–1876) who fought in Italy during the 1860 Papal War before volunteering for the Union side in the Civil War. After the Civil War ended, Keogh received a permanent commission as Captain of Company I, 7th U.S. Cavalry Regiment commanded by George Armstrong Custer during the Indian Wars, and was killed with Custer at the Battle of the Little Bighorn. Ink signature, “M. W. Keogh,” on an off-white 3.25 x 2 lightly-lined slip, clipped from a larger document, with Keogh’s rank, “Captain of Cavalry,” written underneath his signature in another hand. In fine condition, with a very mild shade of overall toning. Pre-certified John Reznikoff/PSA/DNA and RR Auction COA.
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