I decided to reclaim my fallen fortress, because it was a good one and just fell due to a bad timing in my walling.
So thanks to dfhack "autodump" feature to cut immensely the time it would have taken to gather the tons of items that were spread all over the map, i completed the defenses as my primary goal and the hundred of required coffins (as my previous fort ended really in blood) to avoid ghosts spreading too much, i trained a marksdwarf squad and a melee squad and after successfully battling a few goblins siege, new invaders are coming : the humans.
Problem is that i have no idea why they're attacking me now, we got a few trading that went great.
So it's a mystery to me as to why they have decided to send their armies against me, i'm sure no human caravan has been entirely killed by marauding ambushed goblins on my map, they lost a few guys sure (and i took a good care of the goods they left behind
) but it wasn't enough items to really trigger a siege ?
Hmm, anyways, their first army lead by a guy mounted on a war giraffe
met an unfortunate destruction (they lost half of their troops inside my cage trap , the other half was annihilated by my very good war veterans, and the captured guy served as live target practice to improve my marksdwarves).
And they sent a 2nd army, i'm not sure what we have done to the humans, but this time they're really angry :
there are 104 enemies (half being soldiers, most of them mounted on war giraffe, they really love them it seems) and 3 wild animals. They're divided in 4 part, each coming from a different side of the map, effectively surrounding my fort in some more believable siege.
I'll have to wait a bit to see if the traps are good enough to cut half of that or if i should close my bridge and wait the siege to time out.