I sent a fleet of ships to attack The Port city of Yns mon (The Welsh city however it is spelled) and when I reached the town my troop morale became low and one of my men tried to fight me. After the fight, my army was put on land and all 7 of my 90 man ships were stuck in the enemy owned town. If I had not saved the file prior to this, it would have ruined my entire month long campaign.