DENVER--(BUSINESS WIRE)--Aug 26, 2025-- York Space Systems (York), a defense technology company transforming how the United States builds and operates space-based capabilities, today announced the completion and shipment of its final spacecraft to the launch site for the upcoming Tranche 1 Transport Layer launch. A total of 21 York-built satellites—comprising the full payload of the launch vehicle—will lift off by the end of this summer, marking the on-orbit debut of the first generation of the Space Development Agency’s (SDA) Proliferated Warfighter Space Architecture (PWSA) directly supporting warfighters in the field. This press release features multimedia.