WM 5:
The Mieran fleet wins a major victory over its Dieman opponents, more or less destroying the entire galley components of the Dieman fleet. Only to learn that galleys are next to useless against the towering fore-and-aft-castles of Anuirean galleons.
So now there is a stalemate; the Mierans can raid freely along the coasts of Diemed and Medoere, but they can't prevent Dieman caravels and galleons from spotting trade vessels headed fro Iien - and dealing with them.