The town was named after the depot, and Ordnance post office was established in 1943. Due to gradual reductions in military funding for the area after World War II, by the 1960s, Ordnance was no longer a community.
The town's identity was tied to the depot, which led to the establishment of a post office in 1943.  However, due to reduced military funding after World War II, Ordnance ceased to be a self-sufficient community by the 1960s.