Tranche 1 Transport Layer C is one of six missions by the United States Space Force Space Development Agency (SDA) for the Proliferated Warfighter Space Architecture (PWSA) Tranche 1 Transport Layer constellation, which will provide assured, resilient, low-latency military data and connectivity worldwide to the full range of warfighter platforms from Low Earth Orbit satellites. The constellation will be interconnected with Optical Inter-Satellite Links (OISLs) which have significantly increased performance over existing radio frequency crosslinks. It is expected to operate over Ka band, have stereo coverage and be dynamically networked for simpler hand-offs, greater bandwidth and fault tolerance. This launch carries 21 satellites manufactured by Lockheed Martin. October 15, 2025 at 23:06 UTC · Launch Successful Falcon 9 Block 5 — SpaceX, to Polar Orbit Space Launch Complex 4E, Vandenberg SFB, CA, USA The world's 7085th orbital launch attempt, and 236th of 2025. https://www.youtube.com/watch?v=w_yheJOy62s https://www.youtube.com/watch?v=2aGrm_5UMP4 Data: Launch Library 2, The Space Devs. Mission patch: via The Space Devs.