Everyone wants to conquer something as they want to be richer then they already are. If they manage to win against the neighboring town then they would be able to get the richest of the town and any other resources. That includes armed forces. The idea in this game is to be the sole country. You need to capture towns and city to do that. You would get lots of resources if you manage to do just that, but it would be hard, so try to avoid conflict when you are just starting. Get into battle when your town is richer.