During the American Civil War, the Confederate ironclad CSS "Arkansas" was completed at a makeshift shipyard in Yazoo City after the Confederate loss of New Orleans and Memphis. During her short career, the "Arkansas" challenged the Union navy's control of the Mississippi River and helped avert the early fall of Vicksburg. On May 21, 1863, as a Union fleet steamed up the Yazoo River, the Confederate forces burned down the shipyard to keep their foes from capturing the vessels being built there. The Federal forces then burned down the sawmill and lumberyard before withdrawing. After their capture of Vicksburg in July 1863, another Union raid briefly occupied Yazoo City, but this time the Union ironclad USS "Baron DeKalb" was sunk by a mine. Federal troops occupied the town in September and again in October 1863. Another occupation resulted in the Battle of Yazoo City on March 5, 1864 between the Union troops and Confederates led by Robert V. Richardson and Lawrence Sullivan Ross. The Union troops held their ground but departed the following day. The Federal forces returned again on May 19, 1864, doing more damage to the town.