Vogan Civil War

The Vogan Civil War was a short-lived conflict that pitted the Vogan people against each other. It broke out after Chief Councillor Tyrum attempted to have Guardian Vorus deposed. The Vogans under Vorus took refuge deep in the cave systems while those under Tyrum attempted to flush them out.

Vorus' agent, Kellman, was brought before Tyrum and told him that the Cybermen were invading. With this in mind, Tyrum convinced Vorus that they had to work together too quell the attack. In order to kill the Cybermen aboard Nerva Beacon, Vorus wanted to launch the rocket Skystriker at it. However, Tyrum delayed the launch to give the Fourth Doctor time to get Sarah Jane Smith off the beacon, much to Vorus' annoyance.

When Vorus saw that Nerva was on a collision course with Voga, he tied to launch and Tyrum shot him and his ally Magrik, unquestionably ending the short conflict. (DW: Revenge of the Cybermen)