Disputes over the Black Hills of the Dakota Territory came to a high during the Great Sioux War of 1876 between the U.S. Army and the many Native American groups in the area (Lakota, Sioux, Arapaho and Northern Cheyenne). After the Battle of Powder River in March, organized by General Crook and led by Colonel Joseph J. Reynolds, a larger effort was made for a battle later in the spring in order to move the Indians to reservations. Multiple columns of soldiers were made to trap the enemy and prevent escaping. Crook's command, the 2nd and 3rd Cavalries and 4th and 9th Infantries, moved north from Fort Fetterman for the battle. However, they encountered the Sioux and Cheyenne, resulting in the Battle of the Rosebud, which delayed them to the columns in Dakota. The subsequent Battle of the Little Bighorn went on without them.