So, the necromancer ambush left jsut in time for the Dwarven caravan to come in, however before they finished unloading their goods, the necro returned with two more necromancers (apparently there are three of them, not two, one must have slept through the last siege) and about 80 of their loyal abominations. The siege hasn't let up, I did manage to capture a fair number of the zombies (about 15) and one of the necromancers, so if they ever go home (it's been about a season so far) I'll have one less to worry about next time at least.
Unfortunately, this is the 3rd caravan that's been slaughtered in my depot - one of each friendly race! the first time the elves came by, a goblin ambush killed them all, and I shruged and took their stuff. then the humans stopepd in, and the necro ambush finished them off, then the dwarves come in and we get a siege! at this rate I'll be fighting elf and human sieges on top of my undead problem and the usual goblin visits. At least the dwarves won't siege, but they'll probably stop sending the caravan all together if they keep getting killed by zombies and skeleton bits. I don't mind the elves going to war with us, never liked them anyway (although I did TRY to be civil, not my fault they tripped over the goblins on their way in, and never made it out).
Something really annoying about hte undead, though, is that by waiting them out, their numbers swell! when they showed up I counted 80 undead of elf, human, goblin, and dwarf varieties. Now, they have added 10 Ravens, 6 foxes, and a pair of water buffalo to their ranks! combined with a few lost limbs in the fighting while they "recruited" these new minions, they have reached 100 strong in the season they've been clawing at my doors!
Oh well.. if I ever get a break, I have two full caravans worth of goods that the owners will not be reclaiming in the trade depot... I jsut don't know if I'll ever have enough free time to move it all inside.
Edit: Ha! The zombies are still here, and now the goblins decided to invade. Most of them will prob. end up under the necro's command, but if I'm lucky they'll manage to kill my remaining necromancers for me, and I'll jsut have to clean up the mess.