ULA's Vulcan is replacing the company's workhorse Atlas 5 rocket and the already-retired Delta 4 family of launchers.

United Launch Alliance completed its first US national security mission with the newly developed Vulcan rocket, a key test of the vehicle’s ability to put satellites into high orbits above the Earth.

United Launch Alliance knocked out its first Vulcan Centaur launch of the year on Tuesday night, and its first ever for the Space Force.