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The Union Army was the land force that fought for the Union during the American Civil War, which lasted from 1861 to 1865. It consisted of the small United States Army, known as the regular army, which was augmented by massive numbers of units supplied by northern U.S. states, consisting of volunteers as well as conscripts. The Union Army fought and eventually defeated the Confederate States Army during the war. About 360,000 Union soldiers died from all causes and some 280,000 were wounded.