United States Cavalry States Cavalry fought in virtually every campaign in the north during the American Civil War. The U.S. Cavalry played a prominent role in the American Indian Wars, particularly in the American Old West. Particularly notable were the 7th Cavalry, associated with General George Armstrong Custer and the Battle of the Little Bighorn, and the 9th and 10th Cavalry, the Buffalo Soldiers. Infantry units, called by the Indians "walkaheaps", were also involved and in some cases were the main force deployed. Infantry, when mounted, were called "mounted infantry"; they lacked training and skill in horsemanship and cavalry tactics. A notable cavalry
George Armstrong Custer Hills region from the Sioux. When the Sioux refused to sell, they were ordered to report to reservations by the end of January, 1876. Mid-winter conditions made it impossible for them to comply. The administration labeled them "hostiles" and tasked the Army with bringing them in. Custer was to command an expedition planned for the spring, part of a three-pronged campaign. While Custer's expedition marched west from Fort Abraham Lincoln, near present-day Mandan, North Dakota, troops under Colonel John Gibbon were to march east from Fort Ellis, near present-day Bozeman, Montana while a force under General George Crook was to