Decker

Site of the June 17, 1876, battle between the Sioux and Cheyenne Indians and General George Crook's cavalry and infantry. One of the largest Indian battles ever waged in the United States, it set the stage for the Indian victory eight days later when Lt. Col. George A.

The impounded Tongue River provides a 12-mile long reservoir set in the scenic red shale and juniper canyons and open prairies of southeastern Montana.