Talk:New Haven/@comment-78.241.193.132-20130703083305/@comment-4632427-20130704064624

You have to clear the defenders out before you can attack the tower directly. It takes about 6 attacks to depopulate a tower, and if you don't choose carefully, you may have to clear more than one to actually get at the tower itself.

It's possible to do the siege mission fully clearing as few as 2 towers, if you hit the correct ones to give you access to the other buildings you need to target.