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A resident of Pennsylvania, Hiram B. Yeager enlisted in the U.S. Army Corps of Engineers in 1846. Serving in the Mexican War (1846-1848), Yeager received an appointment as an officer in the Third Regiment of Dragoons in 1848. He served in militia companies in Pennsylvania after the war and with the 20th, 68th, and 99th Pennsylvania Volunteers during the Civil War (1861-1865).
Letters, military documents, and financial documents are part of the Yeager papers, associated with his military activities. Primarily letters, a large portion of the papers are associated with the Mexican War.
Mexican War, Military campaigns, Correspondence
DRT Collection at Texas A&M University-San Antonio, "Yeager (Hiram B.) Papers, 1846-1888" (2020). Finding Aids: Guides to the Collection. 106.