I cannot get my mercenaries off the island of Sicily. I landed them there and partook in a couple of successful sieges. But I cannot dock my boats in any province in Sicily to get them off the island. I do not own any provinces there. But the Duke of Sicily owns provinces there that are clear of sieges and occupations. We are not allies but we are both fighting the king of France. Why can't I get my expensive mercenaries to the next place they need to go?