Vulcan Incident

The Vulcan Incident was the Time Lord designation for the event in which the Daleks attacked the human colony on the planet Vulcan. (TV: The Power of the Daleks, PROSE: Dalek Combat Training Manual)

Prelude
In a transmission recovered and recorded in The Dalek Conquests, a Dalek space capsule was on a course which entailed traversing the orbital path of the planet Vulcan when its engines were hit by a meteor strike, disabling maneuvering controls. As a result, the capsule was caught in Vulcan's gravitational pull. Though the Dalek crew attempted to transmit a distress signal to their home planet, Skaro, they found that their transmitter was non-functional as main power shut down, leading to a crash landing on Vulcan. (AUDIO: The Dalek Conquests)

This space capsule was a factory ship. Dalek factory ships were sent out from Skaro by the thousands in the early days of the Dalek Empire. One ship could theoretically produce hundreds of Daleks within a few hours of planetfall. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)

Aftermath
By the year 2136, both Vulcan and the Daleks were considered little more than legends by humanity. (PROSE: The Murder Game)