The Ice Kingdom and the War Kingdom were rivals since the beginning of time. Their rulers never got along. After many wars and lost lives, the current rulers decided to make an alliance.. offering the hand of their daughters in marriage to the princes of the opposing kingdom.Douma and Kotoha from the Ice Kingdom were brothers... who would marry the brothers from the War Kingdom, Koyuki and Hakuji. Obviously strength. All the nobles and commoners of the kingdom were waiting for the royal family