Battle of Norduin
From Warhammer - The Old World - Lexicanum
The Battle of Norduin was fought between the men of the Empire and the men of Bretonnia.
It is unknown exactly when the battle took place, although it must have been after 2502 IC, because Emperor Karl Franz led the Empire army. In fact, it was Karl Franz who finally broke the Bretonnian Knights by leading the charge of the Reiksguard.