It's really hard picturing 10 ants demolishing a city, but okay, sure.
A whole city... meh... a town? definitely... Especially if you need HE/AP shells to deal with the buggers...
The collateral damage alone would be enough to make most of a town uninhabitable in the short term...
And these buggers look capable of
easily biting through gas/water/'leccie lines, creating their own, very mundane but still...., Headaches..
And it looks like they're
definitely not vegetarian, so..... expect the usual panic/looting to toss in a dime or two as well...
And that's
before "Normal Weapons Won't Work On Them, Only Adventurers Can...." even gets to peek around the corner...