Idk… what is the territory? Is it an image, is it a polygon? Is it a square on a grid map. Is it a text field, is it a number? Is it a sprite?
How do you want to control a territory? Can the boarders advance and shrink? can a territory move (floating territories)? Is there a theme change?
We need details about how you want the game to look and act. We can’t see into your head.
I probably won’t be much help, I’m not interested in writing your game for you.
Anyway here is the first thing I found on YouTube.
