The City Guard were actually stolen from Warhammer, where the Dark Elves had a city guard unit that had it's front rank armed with spears and it's back ranks armed with repeating crossbows, which is where I got the base idea and name.

As for Guardsmen, I considered naming them Sentinels, but they really are the basic militia type trooper and I was unsure on giving them a fancy name.

And I wasn't thinking a Cap.. more of high build cost and high upkeep, meaning the enemy can afford to have, say, two orc elites for each Elf Lord you have out. Or something such of those lines.