USS Choctaw was a large (1,004-ton) steamer built for the merchant service, but acquired by the Union Navy during the second year of the American Civil War.
Choctaw, with her crew of 106, was outfitted by the Navy as a ram with heavy rifled guns and was used both as a gunboat and as a ram on the rivers of the Confederate States of America.
From 23 April 1863, until the end of the war, Choctaw operated in the Mississippi River and its tributaries. Between 29 April and 1 May 1863, she stood up the Yazoo River for a feigned attack on Haynes' Bluff, Mississippi, designed to prevent the Confederates from reinforcing Grand Gulf. During this action, she was struck 53 times. Remaining in the Yazoo, she took part in attacks with the Union Army which led to the destruction of Confederate works at Haynes' Bluff and the burning of the navy yard and ships lying there, at Yazoo City, between 18 and 23 May.[1]