The 3rd goblin siege army arrived , while the 1st was rather easy to defeat, the 2nd was a very powerfull wave of destruction, that fortunately was halved by my cage defenses.
This time, a terrible, terrible mistake from me, a dozen of minutes ago, to gather some items from killed snatchers and thief, i removed a tile of my walls, so the hauler wouldn't have to walk all the way.
Nothing wrong until then, the mistake is that i completely forgot about this hole in my wall, being busy with managing other part of the fortress.
And so when i saw the 3rd goblin army (while powerfull, they weren't coming with all those mix of goblins and monsters, there were trolls and goblins, no more flying and grounded mounted horror) i knew the trap and defenses were useless, the enemy was beelining to that hole.
But still while less mounts, they were roughly 60 , and my trained army was around 20
Very very bad.
Fortunately inside of my fort, near the entrance, it's mined in a way that they can't fight at more than 2vs2 , and with my troops stationned there, i had the advantage, as there were around in which it would be 2vs1 in my troops favour
All supported by my marksdwarves.
And so battle occured inside of the fort, my competent troops did their best, and managed to resist, sadly taking horrible losses (very good axedwarves, speardwarves and marskdwarves were lost)
I had to draft quickly all those civilians around to get support and prevent the battle line to break and get the goblins and their trolls inside of the much larger rooms behind .
Finally, the invasion inside of the fort was defeated, but there were a bunch of goblins that were waiting (the AI path was stuck ?) outside of the fort, not moving despite it was all open up to the stairs.
So i sent everyone standing to fight, again terrible losses but in the end it was a victory.
But it came with a price, as nearly all my very good military has been destroyed, lots of drafted civilians dwarves that had some great skills after all that time were killed.
While the 3rd goblin siege army was defeated and ran away to their camp, in total 42 brave and usefull dwarves have been killed.
I highly doubt the fort will survive a 4th siege, unless very lucky a migration wave full of superdwarven migrant come to help before it.