In July 1867, after their annual sun dance at camps on the Tongue and Rosebud rivers, Oglala Lakota warriors under Red Cloud, other bands of Lakota, Northern Cheyenne, and a few Arapaho resolved to attack the soldiers at nearby Fort C.F. Smith and Fort Phil Kearny. These would be the first major military actions of 1867 against government forces in the area, following up the Native American successes in 1866, including the Fetterman Fight. Unable to agree where to attack first, the Sioux and Cheyenne force — variously estimated at between 300 and 1,000 men — split into two large bodies, moving against Fort C.F. Smith, and a similar number, mostly Sioux and possibly including Red Cloud, headed toward Fort Phil Kearny.