Beautiful! You're doing a lot better with UV mapping. Just try to minimize texture stretching and maintain texels 

There are several ways to make Hamippoi work. I opted to make them all 1 actor and unit. Other ways could be:   Cavalry can train cheap melee footmen called "Hamippos." Either as a default feature or unlocked with a tech.  A tech called "Hamippoi" which boosts cavalry. A "Hamippos" infantry unit with a strong aura benefiting cavalry.  Mix and match any of the above. I went with the one unit option for this release. Next release I could try something else. 

In the pull request, they are simply called "Achaemenids" because of the current 1-word nomenclature for civs in the base game. I would like to change this where applicable (specifically when using dynasties for distinction as is the case for Achaemenids), but that's a different Pull Request and requires some discussion. 

Thats pretty cool!

The main post has been updated with the latest version of vassals. -Vassal units can be selected if you want to inspect them but they ignore all commands given to them by the player. -vassals once captured project the players influence around themselves. -vassals will produce patrol armies that protect their territory. -Once a vassals patrol armies get big enough, they will instead be used by the vassal to attack your enemies. Vassals will spawn randomly, but right now they will spawn in the same specific random place  on every map type for testing purposes. The idea of vassals as a complete AI player sounds like a really interesting way to implement the feature, I really want to implement them in such a way that they become points of interest on maps. Something to fight over.