Presidency of Ulysses S. Grant ordered Sheridan to round up the Sioux and put them on the reservation. Sheridan used a strategy of convergence, using Army columns to force the Sioux onto the reservation. On June 25, 1876, one of these columns, led by Colonel George A. Custer met the Sioux at the Battle of Little Big Horn and part of his command was slaughtered. Approximately 253 federal soldiers and civilians were killed compared to 40 Indians. Custer's death and the Battle of Little Big Horn shocked the nation. Sheridan avenged Custer, pacified the northern Plains, and put the defeated Sioux on the reservation. On
5th Cavalry Regiment Henry Thomas. The regiment was rebuilt with new officers and recruits loyal to the Union and was assigned to the Army of the Potomac under the command of General George McClellan. On 21 July 1861, the regiment participated in its first battle of the American Civil War, the First Battle of Bull Run; it was the last action in which they would be called the "2nd Cavalry." In the summer of 1861, all regular mounted regiments were re-designated as "cavalry", and being last in seniority among the existing regiments, the regiment was re-designated as the 5th United States Cavalry. During