Camp Doniphan was a military base adjacent to Fort Sill, just outside Lawton, in Comanche County, Oklahoma, that was activated for use in World War I for artillery training. The camp was named for Alexander William Doniphan, a hero of the Mexican–American War from the Missouri Volunteers of Northwestern Missouri. The camp was home of the 35th Infantry Division, made up of the National Guard of Kansas and Missouri. Harry S. Truman was stationed here, from September 1917 until March 1918, and was assigned to run the regimental canteen. It is here that he made Edward Jacobson his partner.