Topic summary
Evolved Expendable Launch Vehicle
Extracted from the Wikipedia article National Security Space Launch.
Started in 1994 as the Evolved Expendable Launch Vehicle (EELV) launch system program, the initial program goal was to make government space launches more affordable and reliable, leading to the development of the Boeing Delta IV and Lockheed Martin Atlas V EELV families. These remained the primary launch vehicles for U.S. military satellites, and were later joined by the Falcon 9 developed by SpaceX.