The End Times

 is the great cataclysmic apocalypse during which Vermintide occurs.

Summary
The End Times is a long-prophesied great cataclysmic apocalypse that is said to be the final days before the destruction of the Warhammer World. According to prophecy, it was heralded by a twin-tailed comet, resulting in the coronation of the Everchosen, Archaon the Three-Eyed King. Vermintide takes place in 2523 I.C., in the city of Ubersreik, located in the Grand Principality of Reikland.