The Vault - Fallout Wiki

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The Vault - Fallout Wiki
 
The following is based on Fallout Extreme and has not been confirmed by canon sources.

The Doom's Day Missile was a massive nuclear weapon built by the remnants of Imperial China to destroy the American wasteland after the fall of Red China.

The Cause's mission is to deactivate the device before either China, the Huns, or the Brotherhood of Steel can use it against each other.