Quote Originally Posted by DaedalusMkV View Post
Generally speaking, Cheesegear is correct about the sheer variation in infantry regiments, though 100 is seriously low-ball; generally, you won't see a Regiment with less than 500 men. That said, if you want the "gold standard" of infantry regiments, the Cadian VIII is made up of 24 companies, each 300 soldiers strong, plus supporting elements including chimeras and sentinels that bump the regiment's overall strength to about 8000 men.
Hmm, I wasn't aware that the IG had the light/motorised/mechanised/armoured infantry differentiation, but I guess that just emphasises the tech level disparity throughout the whole Imperium, especially since 'cavalry' covers people riding animals (or cyborg war beasts) up to tanks.