To tame you have to complete missions that have a vault involved

You can get tamed thralls via the missions in the city

I find them hard to organize into army’s, maybe a feature could be added to make it easier.

So i had a single player valguero world and i decided to ( don't judge me there was no other option) spawn some in and after that i couldnt walk backwards and there were these “invisible walls” so i couldnt get into my own base, very VERY frustrating