System Delta 84

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][4] SYD 84 is part of the USSF's new structure to consolidate acquisition and support SpOC Mission Deltas.^[5]

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