[quote=@Saint Girralo]
How big (how many) is an Orc Charge? What was the Population of Veiron pre-fall? What percent of that survived the fall?
[/quote]

The size of an Orc charge would vary from charge to charge. I'd say for every three people of they're target town one Orc, so at bear minimum around thirty.

I believe I said this early but Veiron had a population of around 150,000 and if that two to three hundred escaped. Less than 0.2% Survival.