Vanguard
The Vanguard rocket was intended to be the first launch vehicle the United States would use to place a satellite into orbit. Instead, the Sputnik crisis caused by the surprise launch of Sputnik 1 led the U.S., after the failure of Vanguard TV-3, to quickly orbit the Explorer 1 satellite using a Juno I rocket, making Vanguard 1 the second successful U.S. orbital launch.
Vanguard rockets were used by Project Vanguard from 1957 to 1959.
Missions: 11
Successes: 2
Partial Failures: 1
Failures: 8
Success Streak: 0
Success Rate: 22.7%