Have to have at least one slave trader building built (anywhere) in your empire to recruit these units.

Yayy you made my day! I knew ghulam means slave but didn't think it would work that way. Thanks for the help i appreciate it.

bro how can you play with seljuks its too hard, i cant hold religion its always going down even with imams and masjids plus austria sends 2 full stack army from middle of europe to anatolia to attack me

Yes it is very challenging even in the medium difficulty campaign.I usually manage the cities with governor skill that gives happines to cities and it needs 2 lvl governor so very easy to get actually but it usally not enough.So try the historic way and kill all the infidel rebels with big slave armies.

引用自 FighterOfTruva：

bro how can you play with seljuks its too hard, i cant hold religion its always going down even with imams and masjids plus austria sends 2 full stack army from middle of europe to anatolia to attack me

rush the trebizonds, ally with the niceans, destroy the latin empire. that's about it

引用自 Zydrate：

rush the trebizonds, ally with the niceans, destroy the latin empire. that's about it

This guy Turks. I didn't ally with Nicaea but fought Trebizond and Georgia (Georgia is quite strong early) until the Mongolians carved through the Georgians. Once I repelled the Mongolians I turned West and took what was left of Nicaea, and then moved on the Latin Empire. They were quite strong at that point, but I managed to take and hold Constantinople early in the war and they never recovered. I sent an army into Thrace and liberated the Bulgarians who went on to take a few of their territories.

引用自 ZenAgain：

Have to have at least one slave trader building built (anywhere) in your empire to recruit these units.

Does this apply to the Abbasid faction and their Ghulam units?

The same problem is with other factions aswell, for example the Uomini d'arme appiedati from Milan, I just cant figure out which building unlocks them :/