Or reassign the one you've got.
The problem was that the previous Mayor then became the Captain of the Guard somehow and still wanted nice rooms. Amusingly, one of the carvings in the new room was of the "Islandequals" claystone idol, just as predicted.
If your soldiers aren't heroes or champions and they're THAT badly injured...you might consider discharging them and replacing your military...especially now, with invasions off you have all the time in the world to re-train folk. Broken limbs are one thing...they might not even have permanent effects. A mangled head might be a bit much and even if it's not, it'll take excessively long to recover...so long that when it does, that dwarf will be so far behind that he won't have anyone to safely spar with.
Actually, nearly all of them were Champions. They somehow all got to Champion status wrestling each other in the barracks while I was engraving the nobles' bedrooms or something.
Nervous system injuries will NEVER heal. Not even bruises.
Any dorf with a nervous system injury, no matter how slight, will never ever spar again.
Thanks, good to know. What's a good way to keep them from cracking their skulls open while sparring? Give then wooden weapons? Don't let them get to Legendary Wrestling before giving them any weapons at all? Also, is there any way to assign war dogs to Champions? Going to Preferences just comes up with some message to the effect that this guy is so badass he doesn't have to work anymore.
Anyway, that fortress is history now too - I was experimenting with the surface-level river and trying to see if I could make an aritificial subterranean lake. I wound up making one artificial surface lake, and then on my second attempt I flooded some important parts of the second underground z-level. Whoops. Large numbers of dwarfs and animals drowned while congregating and eating in the dining room, so I abandoned. I came back to visit with an adventurer, who fell in the water and drowned while trying to fight against the current to get back up to dry land. Wow, river currents are serious stuff.
My idea was to let the river fill up a pool and then block it off with floodgates and open then and refill as needed, but I couldn't figure out how to get the floodgates in after the bank was breached. One of my previous fortresses had a river that froze in the winter, so in that case I could have mined in and installed floodgates while it was frozen. Is it possible at all with an always-liquid river? People seem to do it with magma, at any rate, which doesn't freeze. Or is it just a matter of hooking up approximately 43902373 pumps?