Camp Clipper was established at a site that reached from Essex Road to this location in the Spring of 1942. It was one of twelve such camps built in the southwestern deserts to harden and train United States troops for service on the battlefields of World War II. The Desert Training Center was a simulated theater of operations that included portions of California, Arizona, and Nevada. The other camps were Young, Coxcomb, Iron Mountain, Ibis, Granite, Pilot Knob, Laguna, Horn, Ryder, Bouse and Rice. A total of 13 infantry divisions and 7 armored divisions plus numerous smaller units were trained in this harsh environment. The Training Center was in operation for almost two years and was closed early in 1944 when the last units were shipped overseas. During the brief period of operation over one million American soldiers were trained for combat. The 33rd and 93rd Infantry Divisions were trained here.ron Mountain Divisional Camp was established at this site in the Spring of 1942. One of eleven such camps built in the California-Arizona Desert to harden and train United States troops for service on the battlefields of World War II. The first major unit trained here was the 3rd Armored Division followed by elements of the 4th, 5th, 6th, and 7th Armored Divisions. In all, one million men trained in the desert before the Training Center was officially closed in May of 1944. The most unique feature built at this camp is the huge relief map built into the desert floor. It can still be seen (1985).

Citation from California Office of Historic Preservation