Do infantry units stack in Endless Legend

From this Steam thread:

• Level up districts (city expansion tile) and cities instead of making lines of unleveled districts.
  To level a district or a city, surround it with 4 other districts
• Research +approval technologies and buildings
• Use luxury goods that improve approval
• Use influence for approval kingdom bonus

In addition to that, some anomalies like the spiral rock peel will provide approval bonuses.

Ok so I found some answers on Amplitude forums.

Battlefield and positioning

Yes, you have to engage your opponent on the tile side where you want to locate your army. If you hover your opponent while you keep right click pressed, a preview of the battlefield will appear.
Reinforcements are simply the other armies that are located in the battlefield.

Turns

In a nutshell, it's not implemented yet:

In the final game we plan to offer a game setting that will allow you to control every round if you wish so. It will probably be 3 settings: simple (1 order phase), normal (3 phases), advanced (6 phases). In all these setting we always keep the same number of rounds (6 rounds), not to change the game balance.

Ranged attacks

Same as for turns: it's still a work in progress.