Fort Sill is a United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 post near Lawton

Lawton, Oklahoma

The city of Lawton is the county seat of Comanche County, in the U.S. state of Oklahoma. Located in the southwestern region of Oklahoma approximately southwest of Oklahoma City, it is the principal city of the Lawton Oklahoma Metropolitan Statistical Area...

, Oklahoma, about 85 miles southwest of Oklahoma City

Oklahoma city

Oklahoma City is the capital and largest city of the U.S. state of Oklahoma.Oklahoma City may also refer to:*Oklahoma City metropolitan area*Downtown Oklahoma City*Uptown Oklahoma City*Oklahoma City bombing*Oklahoma City National Memorial...

.

Today, Fort Sill remains the only active Army installation of all the forts on the South Plains built during the Indian Wars

Indian Wars

American Indian Wars is the name used in the United States to describe a series of conflicts between American settlers or the federal government and the native peoples of North America before and after the American Revolutionary War. The wars resulted from the arrival of European colonizers who...

. It is designated as a National Historic Landmark

National Historic Landmark

A National Historic Landmark is a building, site, structure, object, or district, that is officially recognized by the United States government for its historical significance...

 and serves as home of the United States Army Field Artillery School

United States Army Field Artillery School

The United States Army Field Artillery School trains Field Artillery Soldiers and Marines in tactics, techniques, and procedures for the employment of fire support systems in support of the maneuver commander...

 and well as the Marine Corps' site for Field Artillery MOS school, United States Army Air Defense Artillery School, the 31st Air Defense Artillery Brigade

31st Air Defense Artillery Brigade (United States)

The 31st Air Defense Artillery Brigade is an air defense artillery brigade of the United States Army based at Fort Sill, Oklahoma.- Organization :* 31st Air Defense Artillery Brigade ** Headquarters and Headquarters Battery...

, the 75th Fires Brigade

75th Fires Brigade (United States)

The 75th Fires Brigade is an artillery brigade in the United States Army. It is currently based in Fort Sill, Oklahoma and supports the 1st Infantry Division at Fort Riley, Kansas.- Mission :...

 and the 214th Fires Brigade

214th Fires Brigade (United States)

The 214th Fires Brigade is an artillery brigade in the United States Army. It is currently based in Fort Sill Oklahoma and supports the 4th Infantry Division located at Fort Carson, Colorado...

.