USSA Captain Michael Hagen, along with Captain Richard Wade and Captain Mark Garris, was part of the crew of the Virgo II Lunar Lander. It was the first lunar landing, making contact with the lunar surface on July 20th 1969. The astronauts became the first humans to walk on a celestial body other than Earth.
The landing happened four days after the real-world landing. The mission is the Fallout world's counterpart to the real world's Apollo 11, whose crew consisted of Neil Armstrong, Michael Collins and Edwin 'Buzz' Aldrin.