Warhost of Vastmark (Ships of Merior/Janny Wurts, Vol 2)

The Mistwraith's curse of vengeance has locked two princes into an ever deeper pattern of enmity. Since the deception and betrayal which ended Ships of Merior, their struggle has widened to encompass the fates of the world.

Lysaer, Prince of Light--committed to serving justice, deeply bitter over the total destruction of his fleet, he lacks the means to transport his vast warhost, but swears he will still capture Arithon, defenseless in his shipyard at the seaside village of Merior...

Arithon, Master of Shadow--set back since the fire which has damaged the vessels he built to escape into freedom, he has no choice but to attempt the impossible: to so one ship launched before Lysaer's warhost can corner him, or to raise up a counterforce and meet on a field at a ruinous cost in bloodshed.