Union Army

The Union Army was the army that fought for the  Union during the American Civil War. It was also known as the Federal Army, the Northern Army, or the National Army. It consisted of the small United States Army (the  regular army), augmented by massive numbers of units supplied by the Northern states, composed of volunteers as well as  draftees. The Union Army fought and defeated the Confederate States Army during the war, from 1861 to 1865. Of the 2.5 million men who served in the Union Army during the war, about 360,000 died in combat, from injuries sustained in combat, disease, or other causes, and 280,000 were wounded.
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Noun
1. the northern army during the American Civil War
(hypernym) army, regular army, ground forces