i think that u can only get the new troops by training them in your town or castle, but im not sure

Junglebauer is right, you can only recruit them in castles/towns + you have part of their faction.

You need to own the town/castle yourself. It is a known bug that tier II shows feudal troops however. Tier I and III work fine.

引用自 FireShadow：

You need to own the town/castle yourself. It is a known bug that tier II shows feudal troops however. Tier I and III work fine.

Ok, thanks for telling me!

i ve a castle but it only shows tier 1 and 2 and swadia, im a vasssal of them, is level 4 , and the tier i can hire is max II. It,s because i built the castle or it's a bug?

A faction only unlocks new units at stage 3 (tier II) and 6 (tier III).

Stage I
Feudal technology (default)

Stage II
+4 Ironflesh,
+1 Power Strike
+5 % Income

Stage III
+ Troop Tier (reflecting 15th century)
+5 % Income

Stage IV
+25 Men in lord's parties
+5% Income

Stage V
+1 Agility
+1 Power Strike
+5% Income

Stage VI
+ Troop Tier (reflecting 16th century)
+5% Income

Stage VII
+1 Agility
+4 Ironflesh
+5% Income

Ok thanks so i just need to wait other two stages to hire new troops... cool. Fix the tier 2 bug anyway if you can