How exactly is a tank going to be doing any dodging whatsoever? It can't duck, jump, and has to spend considerable time to turn it's chassis around if it intends to go anywhere but forward (and even then it's still going in a single direction) - anti-armor bazooka shots don't really travel slowly, so there's that. It could always shoot it down, sure. If the projectile was non-explosive in nature (like, say a Railgun), then that wouldn't work out very well either. Hiding from a projectile already shot towards it doesn't make much sense. I don't know what ERA is, please elaborate.