Absolute war is when two countries, who are enemies, fight each other. In absolute war, both countries will use all of their resources, such as soldiers, weapons, and supplies, to try to win the war. They may use planes, tanks, artillery, and lots of other weapons, as well as sending as many soldiers as they can to the battlefield to try to win the war. All of these resources come at a cost, and can cause a lot of damage to both countries.