The mane vaults of fallout

War. War never changes.

This is why the Royal sisters wanted to be prepared for the next nuclear war by building the vaults. Giant vaults made to shelter civilisation from the nuclear radiation so equestria had a chance.

Vault-tec was introduced to build these vaults and sort ponies into them based on age or species so they would be as comfortable as possible. What nopony told us was these vaults were made to test pony kind with various tests and experiments.

Vault 111 was made for cryostasis chambers so the war would last seconds for some ponies.

Vault 11 was made to test what would happen if ponies were told that if one pony wasn't sacrificed every year then life support would be shut down.

Vault 19 was separated into red and blue factions to see how paranoid ponies would react.

How do I know all this?

My names is twilight sparkle and I am the pony that designed the vault experiments.