Vance Paulson was the head of the Marine detachment at Jamestown base.
Vance Paulson arrived at Jamestown with other Marines to help take over the old NASA mining base, which has been occupied by Soviet Cosomauts.
After orders from the President, they accelerate their schedule, and with the help of Tracy Stevens' piloting of the LSAM, Vance, along with the other Marines scare off the Soviets, who quickly flee upon seeing their weapons.
Some time later, Vance and the other Marines spot Soviet Cosmonauts nearby and investigate. When they make contact, both Cosmonauts reach into a box, and he, along with Helena Webster fire their weapons at the two cosmonauts.
When the Soviets take over Jamestown base, Vance is killed by a Soviet Cosmonaut while on the lookout.