Fort Sill was established in 1869 , in what was then Indian territory , by Major General Philip H. Sheridan .
Fort Sill was named in honor of Brigadier General Joshua W. Sill , who died at the Battle of Stones River .
Fort Sill was established in 1869 , in what was then Indian territory , by Major General Philip H. Sheridan , and named in honor of Brigadier General Joshua W. Sill , who died at the Battle of Stones River .