A long time ago, I watched a series of videos on this YouTube account where cubes fought battles with each other. I decided to make something similar in Unity. This was the result:
And here's the more Braveheart-looking version:
The cubes are the soldiers and have to stand close to the enemy to kill it, and the more skinny cubes are archers that can only kill from a certain distance. If you want to help one side, you can add more troops with the "r" or "b" key. I also added a "chicken" function that makes the cubes with a low health run away. These chickens will come back again when they have regained their courage.