The amusing "Siege of Terra" thread has got me thinking about equivalents in the WFB world.

Soooo...what was the biggest battle?

Was it Asvar Kul assualting Kislev? Perhaps Archaons siege of Middenheim?

Or perhaps focussing on a single battle is wrong, the Siege of Terra was made up of battles all over the world, not just the Palace. So thinking that way, perhaps the first daemon incursion was the biggest...IIRC the Elves and Lizardmen were all heavily involved in battling away for a long time.

Or was it one of the many times the Empire has been ravaged? Perhaps one of the Waaaaaaghs?

Also, as a side note, is there any official fluff involving numerous races in one battle (discounting SoC)?