-Titan attack : victory for the fortress without a single loss (great job my military)
-1st big Goblin siege : victory for the fortress without a single loss (great job my myriads of cage traps)
-1st Undead big invasion : victory for the fortress without a single loss (great job my marksdwarves and their lots of bolts, shooting from my entrance building rooftop)
-2nd big Goblin siege : victory for the fortress, but a few losses (2 or 3 civilians and 3 marksdwarves, and most horrible loss, the fabulous medical chief as none else in the hundred of dwarves around has any kind of medical talent) due to the Goblin archers/crossbow users high skills.
***some tantrum are starting to be thrown around the fort, seems like the lost dwarves were very appreciated
-2nd Undead big invasion : victory for the fortress without a single loss (again a great job my marksdwarves and their lots of bolts)
***tantrum are increasing in number a lot, notice that some workshops and famrs are regularly destroyed after being rebuilt and that the cistern is contaminated due to those idiots bleeding all over it and not even trying to clean it.
***idiot tantruming dwarves not even bothering to go drink elsewhere despite there are still areas of the stream that are not yet took over by the stagnant bug, even despite it's marked as water source zone.
***a few dwarves are dying from starving and thirst, despite there are barrels full of food and water available, lot of them are dying from wounds in the hospital and lack of water/food.
***dwarves are berzerking left and right, dwarves are dying from fighting with each other or being struck down by my military (when they're berzerk).
Conclusion : the fortress is obviously falling, in a season it went from a strong 120 living dwarves (at the end of the last invasion) to currently 53, and the tantrum spiral is not close to being finished as it continue to rage around.
Can't believe that just losing a very dwarves led into a murdering and death rampage that was incredibly more efficient than any kind of goblin and undead army at destroying my fortress.