The Defense Support Program (DSP) is a program of the United States Space Force that operated the reconnaissance satellites which form the principal component of the Satellite Early Warning System used by the United States.
Buckley Space Force Base is a United States Space Force base in Aurora, Colorado named after United States Army Air Service First Lieutenant John Harold Buckley. The base is run by Space Base Delta 2, with major units including the U.S. Space Force's Space Delta 4, the Colorado Air National Guard's 140th Wing, the Denver Naval Operations Support Center, and the National Reconnaissance Office's Aerospace Data Facility-Colorado.
The 22d Space Operations Squadron is a satellite control unit of the United States Space Force. It is part of Space Delta 6 and is located at Schriever Space Force Base, Colorado. Prior to July 2020 it was part of the 50th Network Operations Group, itself a part of the 50th Space Wing.
The 2nd Space Operations Squadron is a United States Space Force unit responsible for operating the Global Positioning System (GPS) satellite constellation, which provides global navigation, time transfer, and nuclear detonation detection. It is a component of Space Operations Command's Space Delta 8 and headquartered at Schriever Space Force Base, Colorado.
Space Systems Command (SSC) is the United States Space Force's space development, acquisition, launch, and logistics field command. It is headquartered at Los Angeles Air Force Base, California and manages the United States' space launch ranges.
Space Launch Delta 30 is a United States Space Force space launch delta assigned to Space Systems Command and headquartered at Vandenberg Space Force Base, California. The Space Launch Delta 30 is responsible for all space launch operations from the west coast, which includes all polar launches. It manages the Western Range and launch activities for the Space Force, Department of Defense, NASA, and other private space corporations. The Space Launch Delta 30 also supports test and evaluation launches of the U.S. Air Force's intercontinental ballistic missile force.
The 13th Space Warning Squadron (13SWS) is a missile warning unit assigned to the United States Space Force and located at Clear Space Force Station 5 miles (8 km) south of Anderson, Alaska
The 16th Electromagnetic Warfare Squadron is an active United States Space Force unit, stationed at Peterson Space Force Base, Colorado as part of the Space Delta 3. The squadron protects critical satellite communication links to detect, characterize, geolocate and report sources of electromagnetic interference on US military and commercial satellites. The squadron also provides combat-ready crews to deploy and employ defensive space electromagnetic warfare capabilities for theater combatant commanders. The squadron is Air Force Space Command's first defensive counterspace unit.
Cape Cod Space Force Station is a United States Space Force station located in the northwest corner of Joint Base Cape Cod, United States, on Flatrock Hill in Bourne, Massachusetts. Cape Cod Space Force Station began construction in 1976 as Cape Cod Missile Early Warning Station and was renamed Cape Cod Air Force Station in 1982, before assuming its current name in 2021.
The 233d Space Group is a unit of the Colorado Air National Guard located at Greeley Air National Guard Station, Greeley. The 233d Space Group provides immediate, worldwide missile warning, space launch and detection in the event of an attack against the United States. If activated to federal service, the Wing is gained by the United States Air Force Space Command.
The 11th Space Warning Squadron is a United States Space Force missile warning squadron, located at Buckley Space Force Base, Colorado.
The 7th Space Warning Squadron (SWS) is the premier Space Domain Awareness sensor on the West Coast. The unit was originally established to guard the U.S. West Coast against sea-launched ballistic missiles from the eastern outskirts of Beale Air Force Base approximately 8 miles (13 km) east of Marysville, California. 7 SWS is a geographically separated unit of Space Delta 4.
The 12th Space Warning Squadron is a United States Space Force ground-based radar used for missile warning, missile defense, and space situation awareness, stationed at Pituffik Space Base, Greenland.
The United States Air Force's 8th Space Warning Squadron is an Air Force Reserve missile warning unit located at Buckley Space Force Base, Colorado. The 8th works alongside its active duty counterpart, the 2d Space Warning Squadron, on the Defense Support Program and Space-Based Infrared System programs.
The 4th Space Warning Squadron is an active United States Air Force Reserve Command unit, formerly located at Holloman Air Force Base, New Mexico, and now located at Buckley Space Force Base. The unit was activated on August 3, 2019. It was previously activated in May 1992 as the 4th Space Communications Squadron, when it took over the mission and personnel of the 4th Satellite Communications Squadron, before being inactivated in March 1996. The squadron's primary mission is to provide mobile Defense Support Program support in case of hostilities.
USA-273, also known as SBIRS GEO-3, is a United States military satellite and part of the Space-Based Infrared System (SBIRS).
Space Operations Command (SpOC) is the United States Space Force's space operations, cyber operations, and intelligence field command. It is headquartered at Peterson Space Force Base, Colorado and serves as the U.S. Space Force's service component to United States Space Command. Space Operations Command consists of Space Operations Command West, its mission deltas, and garrison commands.
Space Delta 4 is a United States Space Force unit responsible for providing strategic and theater missile warning to the United States and its international partners. It operates three constellations of Overhead Persistent Infrared (OPIR) satellites and two types of Ground-Based Radars (GBRs) for the purpose of conducting strategic and theater missile warning. Additionally, DEL 4 provides tipping and cueing to missile defense forces, battlespace awareness to combatant commanders and technical intelligence for further analysis and manages weapon system architectures and ensures operations are intelligence-led, cyber-resilient, and driven by innovation, while postured to operate in a contested, degraded, and operationally-limited environment.
Space Base Delta 2 is a garrison delta in the United States Space Force. It is responsible for providing installation support functions for the resident air operations, space-based missile warning capabilities, space surveillance operations, and space communications missions at Buckley Space Force Base, Cape Cod Space Force Station, Cavalier Space Force Station, and Clear Space Force Station. It also provides airmen and guardians that deploy and are deployed in-place, to accomplish warfighting missions globally.
While the United States Space Force gained its independence on 20 December 2019, the history of the United States Space Force can be traced back to the beginnings of the military space program following the conclusion of the Second World War in 1945. Early military space development was begun within the United States Army Air Forces by General Henry H. Arnold, who identified space as a crucial military arena decades before the first spaceflight. Gaining its independence from the Army on 18 September 1947, the United States Air Force began development of military space and ballistic missile programs, while also competing with the United States Army and United States Navy for the space mission.
United States 
United States Space Force 
