I'm going to make sure of it.
Those.
Damn.
Goblins.
Won't.
Take.
This.
Damn.
Fort.
K so heres the plan.
Dig out a valley around the fortress, with floodgates and a water source, if an enemy were to attack, flood the valley and raise up the bridges. past the valley we have several lines of cage traps, if they survive those we have several lines of large serrated disk traps. Inside, a long hallway is full of floor hatches that, when open, drop any enemy down 2 Z levels into the pit. The pit is a room full of traps, and if they get past the traps, there are several rows of cage traps and then, if they make it past that, there is an exit gaurded by 3 steel doors and various more traps. From there, every part of the fortress is gaurded off by steel doors of the highest quality. I can close off sections to my liking and should be able to survive. Inbetween sections there are trap rooms, so I can lure enemies into them and dispose of them swiftly.
Further away from the fortress, an extremely deep lake will rest, with the tower of all towers rising out of it, bringing despair to our enemies. The tower is only accessible by underground tunnel(it will actually start at the bottom of the lake and rise up). As a last ditch maneuver, all dwarves can be called into the tower for protection. it will be complete with enough rooms to house up to 200 dwarves, and have stockpiles & farms. All workshops will be included, as well as several dining halls and rooms for nobles. As a last- LAST ditch maneuver, the tower can be flooded, crushing our dwarven empire but the enemies as well. All dwarves would be called up to the top floor and the 5 flood gates, each connected to separate switches on different levels, and made of steel, would be released. If any dwarves live, there is a set of flood gates that can be opened to drain the lake and by extension, the tower. From there, we can reclaim our fort and rebuild our losses. But we will live on.
On the brighter side, we will take the goblins we cage and kill them off in the most brutal ways possible. Including dropping them off the side of the tower and letting them fall all <really large number> Z levels into the extremely deep lake of doom.
I plan to make this happen. I will not finish it all in my time there but damnit I will start it.
Actually, I'll probably map out most of the tower to be constructed and leave detailed instructions with my successor.(i.e where to place those billions of traps I've been constructing)