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The Vault - Fallout Wiki
The Vault - Fallout Wiki
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Mariposa Military Base excavation
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LocationMariposa Military Base
Involved parties
EnclaveMariposa super mutant
Main article: Enclave#military

According to contradicting information from the Fallout Bible:

  • July through August, 2236. The Enclave scientists and chemical corps scour the remains of Mariposa Military Base, while assault squads comb the desert for slaves they can use to mine the Military Base (Fallout Timeline.)
  • The Enclave held the site for many years, but abandoned it after obtaining the FEV samples.

Purpose: FEV search for the Project. CO: Col. Sanders, the highest rank known Enclave officer.

Beginning of the operation

Joint task force consisted of:

  • (verti)Assault squads that combed the desert for human-supermutant slave workforce to mine the Military Base.
    • At least two squads.
    • Frank Horrigan present, recently removed from Secret Service after some undocumented psychotic blunder.
  • Enclave Patrolmen - very probably part of the Enclave Control Company:
    • Officer with Captain rank present and at least one Sergeant.
    • At least one squad equivalent, including an Enclave patrol, that captured Melchior, a miner from Redding.
  • Scientists team of US Chemical Corps aka "pencil necks."
  • Construction crews (supported by 1st generation super mutant slaves, when excavations began at 2236 Sept - according to Fallout timeline.)
  • Vertibird transport.

Small 4 tents temporary camp established outside the base.


  • Power generator established.
  • Provisional lifts built in.

Termination of the operation

FEV samples was obtained just before military action and base sealing.
The Enclave Patrolmen squad equivalent was lost during unexpected battle during a revolt of the mutated slave miners (10 the Enclave Patrolmen KIA). Supermutants suffered heavy casualties, but 27 of them survived. The Enclave Patrolmen losses:

  • A Patrolman on the 4th level.
  • Sgt. Bracks and two Patrolmen on the 3rd level (checkpoint 3.)
  • Three Patrolmen on the 2nd level (checkpoint 2.)
  • Cap. Pickard and two Patrolmen on the 1st level (checkpoint 1.)

Each checkpoint equipped with 2 radios.

Inconsistencies of the Fallout Bible

A single squad was left behind to wipe out the mutated miners, while according to the game and Enclave holodisks found at Mariposa Military Base:

  • The mutants attack was sudden and two checkpoints were destroyed almost immediately (7 troops killed.)
  • Cap. Pickard with 2 troops was going just to hold supermutants at his checkpoint 3 position, as long as he could (The access corridor to the Base entrance.)
  • Ten of the troops killed were a squad equivalent, but were not an actual squad left behind to wipe out the mutated miners.

Mariposa Military Base was sealed in Jan 2237, while according to Mariposa Military Base 1st level entry information - the battle against the Enclave Patrolmen occurred recently (another Fallout Bible inconsistency: the Enclave held the site for many years.)