From The Vault - Fallout Wiki
Convince the Elders to send help to Mariposa is a side quest in the original Fallout.
- Enter Mariposa Military Base to discover the mutant danger.
- Return to Elder John Maxson and inform him of the threat.
- Talk to Elder Mary about obtaining Paladin support.
- 3 assisting Paladins at Mariposa Military Base.
- Originally, the player would have to select between assaulting either Mariposa or the Cathedral. The latter was scrapped, although dialogue files and the appropriate characters exist to make this possible. The script simply dummied out the option to ask for Paladin support at the Cathedral. If that was available, then two Paladins would assist the player in fighting through to the Master.