Space Delta 12 (DEL 12) is a United States Space Force unit responsible for space test and evaluation. It tests space systems and capabilities in support of weapon system acquisition, operational acceptance, and readiness. It was established on 23 August 2021 following the establishment of the Space Training and Readiness Command, the field command to which it reports. It is temporarily headquartered at Schriever Space Force Base, Colorado, but its final location requires a base selection process.
DEL 12 was originally activated as the USAF’s 6565th Test Wing in October 1960 at Vandenberg AFB, CA. The wing was re-designated as the 6565th Test Wing (Development) in December 1960 and was subsequently re-designated, this time as the 6595th Aerospace Test Wing, in April 1961. The wing was inactivated in October 1979. It was reactivated on 23 August 2021 and redesignated as Space Delta 12.
A ceremony was held on 27 August 2021, activating three squadrons and redesignating two squadrons that were realigned under DEL 12.