100 years ago, the whole picture of the first-ever total war that burned down Europe. Trench warfare, firepower warfare, maneuver warfare, penetration warfare, tank breakthrough warfare, landing warfare, fleet decisive battle, submarine warfare, aerial warfare ... WW1 which was the origin of modern warfare is thoroughly explained with illustrations, plates and photos! Valkyrie, who represent the great powers, explain World War I, which is not well known in Japan, in an easy-to-understand manner.