Are you sure about Ulm ?
On the one hand, they are strong and wear heavy armor, which is good.
But on the other hand, normal Ulm is also the most advanced nation as far as forging is : it has the best steel and forging bonuses... Yet you send them back to stone armor. Not even copper, stone...
I think you should at least give them something that announces their coming mastery. Perhaps capital only troops of some kind ?
Here is an idea : Capital site Fallen Meteorite, allows the recruiting of Ulm Ironclubs.
"A Meteorite made mostly of iron fell from the skies. The heat from that fall created a crude form of steel. By putting sharp edged fragments of that meteorite on their clubs, the artisans of Ulm have created a truly awesome weapon, able to penetrate most armor".
And then you make the Iron clubs armor piercing, but with low damage and attack value (they are still crude and cumbersome...)
name=Iron_Club dam=3 (armor-piercing) att=0 def=-1 length=1 hands=1 hits=1 res=5 new=1
or perhaps a 2-handed club (easier to stick the steel to the club) .
name=Iron_Club2 dam=4 (armor-piercing) att=0 def=-1 length=3 hands=2 hits=1 res=7 new=1
And you could the create a "Meteorite smith" leader, which does not get a penalty on item forging...
At first I thought about some kind of armor, but they already have their stone platemail (just imagine the time needed to make stone mail !!), and I like that idea
So, what do you think ?