So I met my first forgotten beast. I breached the first cavern level, and put some traps and a door in the only passage between my fortress and the cavern to keep creatures out. I was using the cavern for tree and silk gathering. And, due to the cage traps, tons of creatures that will come handy. I already have a tame GCS.
So this is the time when the FB arrived. I never met one before, so I didn't really know what to do. Some dwarves were down there hauling logs up to the fortress. Needless to say, they were the first target of the beastie. I soon saw that it ignores traps, so I locked the door. After it were finished killing my dwarves down there, it stopped a few tiles from the door. I thought that the door stopped it, so I went back managing my fortress.
So what to do now? Send in the military? They are such a rookies. They had a lot of armour and wrestling training, but so little weapon training, and they only have iron equipment. So, I decided to come up with another plan.
I was doing my business when I saw other dwarves dying. I looked at the cavern, and saw my dwarves collecting my dead. Whoops! How did they get down there? I soon realised that the door is gone and the beast is rampaging in the mines chasing and killing dwarves. OK, I thought, it is time to have some Fun. My last chance is to send in the military. I ordered my squads to kill the FB, and waited. After a few more dead dwarves, seeing that they don't come, I looked at what they are doing. "Soldier (cannot follow order)". What the hell? The civilians are dying down there, and the soldiers are just standing around clueless. OK, best I can do, order them to move near the FB. It didn't take much time that they run down there and started fighting.
Suspense, suspense. What will happen?
OK, it seems that they won't go down that fast. It is good news, but I have to go now. Save, exit.
Next time I have the chance, I fire up DF, and continue to see what happens. I scroll to the battle scene and unpause. After a few moments, the FB is dead. No soldiers are dead or wounded. What an anticlimax!
OK, it's time for some cleanup. Let's see our losses. 8 dwarves are dead and one wounded (he lost one arm and one leg). Now get back to the daily work and continue our Great Project. Wait, the humans have just arrived and want to trade with me! They are already unloading. Quick, finish the business with them. And don't forget to tell the engraver to carve this incident to as many walls and floors as possible. But what is he doing? Lots of pictures of the foundation of my fortress, Counselledslings (why didn't I get a really creepy name like the great precursors?), historical events, the rise of my leaders. Oh, the Cave Crocodile incident of last year is here, too. Keep on the good work, Dumed!