The Camp Hyder was a sub camp of the US Army, Desert Training Center in Riverside County, California. The main headquarters for the Desert Training Center was Camp Young, this is where General Patton's 3rd Armored Division was stationed. Camp Hyder is 2 miles (3.2 km) miles south of Hyder, Arizona. The camp was just north of the Gila River. Camp Hyder is 60 miles (97 km) miles east of Yuma, Arizona, near Camp Horn. Camp Hyder was built at the site of an old 1890s military base. Trained at Camp Hyder, in 1943, for six months was the 77th Infantry Division from April 1943 to September 1943. Then the 104th Infantry Division moved in for training. Unlike the other camps, no large tank activity was done. The camp was built by The 369th Engineer Regiment. Camp Hyder had it own rail station at wh