From Halopedia, the Halo wiki
- "Captain, the base power is offline and the lockdown protocol in effect. If we rebuild, the lockdown will end and the doors will open."
- — Serina
A Lockdown Protocol is a United Nations Space Command protocol that pends to military bases. Should a Firebase receive a certain amount of damage, a lockdown will be enforced, doors closing around its walls and preventing entry or exit. Only when the base has been returned to operational status will the protocol be lifted.
List of appearances
- Halo Wars (First appearance)