Based upon upon land being a part of the battlefield.

The elves like to keep thins relatively static, working to a rhythm. Red likes to burn things for immediate advantage, and risks diving too deep. Black likes it when you dive too deep, and can really make life a misery when you do - but can only harass a little bit until then.

Blue tends to sneak in the back way when you're not looking. White is city-building dwarves.

The aim of the set is to promote a ground-stall somewhat; leading someone to do something drastic and kick off the horrible disaster. The first part of that works... the second bit? Not so much.