Tranche 1 Transport Layer E 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 York Space Systems. July 16, 2026 at 20:32 UTC · Launch Successful Falcon 9 Block 5 — SpaceX, to Polar Orbit Space Launch Complex 4E, Vandenberg SFB, CA, USA The world's 7342nd orbital launch attempt, and 169th of 2026. https://www.youtube.com/watch?v=8FWEeOWY4Bs https://www.youtube.com/watch?v=rLAfNp2CtrY Data: Launch Library 2, The Space Devs. Mission patch: via The Space Devs.