The emperor sent out a servant to get the bag of gold and Silver from the other empire. Then the other empire came to get it back. Little did they know that they would fighting later that afternoon. The emperor thought she had not stolen but she did.
The two kingdoms are fighting because the servant stole gold and silver from their kingdom. The servant was sent out to ask for it nicely but instead she stole from them. The two kingdoms were pretty close friends and they would never harm each other. Since the servant stole from them they have been fighting for a while now.