| System Delta 84 | |
|---|---|
| Since July 2025, System Delta 84 has no official insignia | |
| Active | July 10, 2025 - present |
| Country | United States |
| Branch | Space Force |
| Role | System Delta |
| Garrison/HQ | Los Angeles Air Force Base |
| Commanders | |
| Current commander | Col. Stevie Medeiros |
System Delta 84 (SYD 84) is a unit of the United States Space Force (USSF) that was activated at Los Angeles Air Force Base on July 10, 2025 as a part of USSF Space Systems Command. Col. Stevie Medeiros assumed command of the unit as its first leader. [1] The unit is responsible for Space-Based Missile Warning and Tracking, including threats such as hypersonic weapons and will be linked to its partner delta SpOC Mission Delta 4. [2] The Delta is the first system delta of the USSF. [3] SYD 84 is part of the USSF's new structure to consolidate acquisition and support SpOC Mission Deltas. [4]