The role of Fort Sill has evolved since Maj. Gen. Phillip H. Sheridan drove the first stake here in 1869. Fort Sill Soldiers originally protected settlers in Texas from raids by the Plains Indian tribes. Soldiers from famous units like the 7th Cavalry, led by Col. George A. Custer, and the 10th Cavalry, known as the Buffalo Soldiers, used Fort Sill as a base in the Indian Wars.
As the tribes accepted peace with the U.S., Fort Sill’s mission changed. ...

Mission
U.S. Pacific Command (USPACOM), together with other U.S. Government agencies, protects and defends the United States, its territories, Allies, and interests; alongside Allies and partners, promotes regional security and deters aggression; and, if deterrence fails, is prepared to respond to the full spectrum of military contingencies to restore Asia-Pacific stability and security.

Commander's Intent
Purpose.
To protect and defend the United States, its territories and interests; to promote regional security and deter aggression; and to be prepared to respond ...