Board Thread:Questions and Answers/@comment-1075234-20130729191220/@comment-7263041-20130729222847

If the details are not set in stone via a lore source, then you're essentially free to use rough estimates as far as I'm concerned. I'd say make the casualities for the horde close to the same (although not identical, give or take a few thousand or five) and Scourge in the hundreds of thousands.

For the Argent Crusade and the Ebon Blade however I'd make their numbers smaller as far as casualties are concerned. Certainly not as large as the Horde and Alliance forces. The Argent Crusade would have lost a lot more than the Ebon Blade (especially if you count the Battle for Light's Hope before the Crusades formation) so I'd say make their casualties around 20,000? As for the Ebon Blade, maybe 5000? Considering that they are Death Knights and not that easy to kill again...

It's up to you though, just try not to use the same numbers or the same even numbers. No war has an even number of casualties, so throw in some random numbers there when you're describing troop numbers and losses and you should be good.