Just when you think things in Townbrush can't get any worse, dwarves start to randomly explode for no adequately explored reason.
When you say that the migrants were greeted by the sight of the Forgemaster collapsing, did you mean that he was collapsing as the migrants entered, or was it a very brief time after?
Well since building degredation isn't a part of Dwarf Fortress, the Fort itself really can't collapse no matter what happens. What I meant was that I had to have the migrants break down part of the outer wall to get in because the bridge was retracted. I didn't want to send anyone up to raise the bridge for two main reasons. One, I'd rather have Dwarves moving to the surface as little as possible. Two, this fort has been going on for so long that I have forgotten which lever does what. So there's a good chance that the lever I pulled would impale the migrants on spikes rather than let them in the fort.
I would guess that the migrants tracked through something on their way in and started smearing it all over. Assuming the denizens of New Townbrush don't have access to a well.
There are several wells in Townbrush, but none of them in New Townbrush. I didn't think one would be neccesary. Still, I'm not quite sure how this deadly disease suddenly popped up when none of the Dwarves or animals had been afflicted by it before. My only guess is that there some piece of old military equipment stained with forgotten beast blood. One of the new recruits decided to pick up said piece of equipment, causing them to catch the disease. When they died, another recruit would pick up the equipment of the recently deceased dwarf, becuase whenever someone dies a Dwarves first thought is "free stuff!". Of course this equipment is covered in the blood of the afflicted Dwarf, so now this dwarf is infected as well. Thus leading to an endless disease becuase Dwarves are greedy bastards and can't resist pokceting their friends blood soaked socks.
Also, this might be the 4 hours of History Channel I watched the other day, but the whole "New Townbrush" rebuild the fallen empire, militarize the working man, take on everything attitude struck me as a bit of Facist stroke, in the vein of Hitler's Germany or Stalin's Russia.
Any relation between the Dwarven government and various Facist rulers are purely coincidental, and if you say otherwise I'll throw you into the magma pit.
All is not lost though. 4 Dwarves have survived the deadly plague. Of course, it was only because I quarantied them further in the caverns, along with an unlucky outpost liaison. So they are living in a bunker within a bunker. I'm not sure what exactly to do at this point, other than continue the mandatory military training. One immediate problem is that despite being locked inside the caverns, there are no trees accesible to my Dwarves. Which means there would be nothing to hold the booze brewed from plump helmets, which are fortunately in abundance. However, there is a pit of water nearby. It was one of the areas flooded when I pierced the ocean. Funny how the previous disasters of Townbrush sometimes come in handy when a new problem comes along. Speaking of flooding, I'm considering carefulyl building an elaborate pump system over time. One that will flood Old Townbrush and parts of the caverns, washing away the deadly rot. Of course odds are that I would just end up killing everyone, but I don't have many options.