Retrieve the FOB from the base Commander

 is a quest in Fallout 2.

Walkthrough
Lie to the Navarro guard saying you're the cleaning crew and *clean* the shelves of their FOB. If you talk to the cook about the main base and the FOB, then pass a speech check with Commanders door guard you can say that base sent you to secure the FOB and lock it up and then freely loot the commanders shelves.