The site of Fort Sill was staked out on January 8, 1869 by Maj. Gen. Philip H. Sheridan who led a Campaign into Indian Territory to stop hostile tribes from raiding border settlements in Texas and Kansas. Sheridan's massive winter campaign involved six cavalry regiments accompanied by frontier scouts such as "Buffalo Bill" Cody, "Wild Bill" Hickok, Ben Clark and Jack Stilwell. Troops camped at the location of the new fort included the 7th Cavalry, the 19th Kansas Volunteers and the 10th Cavalry, a distinguished group of black "buffalo soldiers" who constructed many of the stone buildings still surrounding the old post quadrangle.  The School of Fire for the Field Artillery. was founded at Fort Sill in 1911 and continues to operate today as the world renowned U.S. Army Field Artillery School. At various times Fort Sill has also served as home to the Infantry school of Musketry, the School for Aerial Observers, the Air Service Flying School, and the Army Aviation School. Today as the U.S. Army Field Artillery Center, Fort Sill remains the only active Army installation of all the forts on the South Plains built during the Indian wars. It serves as a nation historic landmark and home of the Field Artillery for the free world.