Claim: In order to prevent any of the native Americans from joining the hostile Crow, Brig. Gen. Thomas H. Ruger was placed in command  of five regiments, among which is the seventh cavalry who was led by  Captain Myles Moylan.
Evidence: Meanwhile, the United States Army was also taking action, Brigadier General Thomas H. Ruger was placed in command of the soldiers at Fort Custer and Fort McKinney, Wyoming and instructed to launch an expedition into the Big Horn and occupy the Cheyenne reservation, in order to prevent any of the natives there from joining the hostile Crow. Command
Brig. Gen. Thomas H. Ruger 1st Cavalry 7th Cavalry
Captain Myles Moylan 9th Cavalry 3rd Infantry 7th Infantry