Well, I appeared to have lucked out. A FB attackos a amber humanoid (amber being how hard? I've never seen it in game.) with deadly vapors attacked. It was appearantly pretty hard, but this became irrelevant, as a completely accidental combo of archers and a hammer dwarf managed to injure pretty well, allowing my military to show up and beat it up further. Appearantly yak leather is deadly, as attacks by my archers using their shields went well. The last attack was actually a leather shield banging his head off. And the Vapor gives a mild fever so far, and only affected 2 dwarfs.
A Dwarven atomsmasher nearly killed dwarf when I prematurely activated the switch. The dwarf who escaped did so within the same one tick. Must've been like in the movies where you dodge out of the way.
Yet another dwarf has been injured due to the mist generator. I would stop telling them to go in there, but at this point Its just hilarious. I've installed a little exit for the animals who get stuck there, so they get rescued or escape before stuff happens. But its so funny, they try to go up, get knocked back, go back up, fall back down.
The memorial to all thoise who've given there lives to the fort has proceeded as planned, despite mining labor shortages. A statue of the old military commander has been installed in the memorial hall, as well as plans for the old king to have his own monument.