Late Expansion Era
From Tardis Wiki, the free Doctor Who reference
During the Late Expansion Era, a group of Nomad Cybermens sought to invade the station Poseidon, intending to use it as a beachhead for a later invasion of Ultima Tarsus, only to fall victim to the Void energy sent out by a rogue Type 1 TARDIS. Being driven to proceed in invading the station, the CyberNomads were destroyed when the Tenth Doctor activated Poseidon's self-destruct. (COMIC: The Lost Dimension)
