Military casualty is the percentage of military units of a kingdom that are lost during a war. For all wars, both the attacker and defender kingdom takes some percentage of military casualty. For the wars between two kingdom centers, the kingdom with the lower military casualty wins the war. On the other hand, for the wars of conquest at a colony or traderoad, the looser will take 100% casualty. If the looser is the owner of the colony or traderoad (defender), that place will pass to the attacker and the surviving units of the attacker kingdom will be deployed there automatically.