Martial law

Martial law was a state of government in which military leaders took power if civilian ones failed to do so. The Marshal of Solos took power under martial law after the death of the Administrator. (DW: The Mutants) In an alternate timeline, a state of martial law occurred after the emergency government failed to maintain control. (DW: Turn Left)

In Pete's World, London was placed under martial law after the Cybermen moved into the city and the EarPods were activated. (DW: The Age of Steel)