WAC led to the development of the Army's Corporal missile, the first
U.S. ballistic missile to approach the capability of the German
V-2. The Corporal went into production in the early 1950s and was
deployed by the U.S. Army in Europe until the mid-1960s.
WAC was mated to the V-2, in Project Bumper, to make the world's
first two-stage liquid-propellant rocket. In 1949 the fifth flight
of a Bumper WAC reached an altitude of 390 kilometers (234 miles),
a record that stood until 1957.