You're god. You rule of king and kingdom. You raise mountains and you drown lands into the sea.
My sister was incredible good at this, but then again she's always been the dictator of the family. You have two empires on a map, and each is controlled by a god, one of them is you. You job is to influence your people is such way that they get strong enough to eradicate the other empire.
It's not as easy as it sounds. I never really understood what made my people suddenly go to battle. I hadn't ordered them to and I couldn't find any indication of when this was going to happen. When the battle started, I had no idea on how to aid my people into winning. I guess this game was just too hard without a manual for a 10 year old.