There's no way they could "level" Seoul with conventional weapons, it's way too big and per what I've read but ought to check more closely, beyond all but the

There's no way they could "level" Seoul with conventional weapons, it's way too big and per what I've read but ought to check more closely, beyond all but the heaviest of artillery (i.e. beyond 152 mm range, even with rocket assist (which reduces the payload)). Cause serious damage and kill a lot of people, yes, especially during the several days it would require to disable the howitzers in their Hardened Artillery Sites (HARTS).