What today is Ft. Huachuca was a new fort to counter the Chiricahua threat and to secure the border with Mexico. On March 3, 1877, Captain Samuel Marmaduke Whitside, accompanied by two companies of the 6th Cavalry, chose a site at the base of the Huachuca Mountains that offered sheltering hills and a perennial stream. In 1882, Camp Huachuca was redesignated a fort.
General Nelson A. Miles controlled Fort Huachuca as his headquarters and against Geronimo in 1886. After the surrender of Geronimo in 1889, the Apache threat was essentially extinguished, but the army continued to operate Fort Huachuca because of its strategic border position. In 1913, the fort became the base for the "Buffalo Soldiers", the 10th Cavalry Regiment, which was composed of African Americans. It served this purpose for twenty years.
With the build-up during World War II, the fort had an area of 71,253 acres, with quarters for 1,251 officers and 24,437 enlisted soldiers. The 92nd and 93rd Infantry Divisions, both with African-American troops, trained at Huachuca.
In 1947 the post was closed and turned over to the Arizona Fish and Game Department. However, due to the Korean War, a January 1951 letter from the Secretary of the Air Force to the Governor of Arizona invoked the reversion clause of a 1949 deed. On February 1, 1951 The US Air Force took official possession of Ft. Huachuca, making it one of the few Army installations to have an existence as an Air Force Base. The Army retook possession of the base a month later, and reopened the post in May 1951 to train Aviation Engineers in air field construction as part of the Korean War build up.
On 1 February 1954 Huachuca was reactivated after a seven-month shut-down following the Korean War. It was the beginning of a new era for this one time cavalry outpost, one which saw Huachuca emerge as a leader in the development of Electronic warfare. Major tenants are the Army Network Enterprise Technology Command 9th Army Signal Command and the United States Army Intelligence Center. Libby Army Airfield is located on post and shares the runway with Sierra Vista Municipal Airport; it is on the list of alternate landing locations for the space shuttle, though it has never been used as such. Fort Huachuca was declared a National Historic Landmark in 1976.
The area is so desolate and barren, an old army description of the fort states, "It is the only fort in the Continental United States where you can be AWOL (absent without leave) for three days and they can still see you leaving"!