| However, along with the development of civilization, the gradual increase of population, and the establishment of social structure such as countries and land, large wars had occurred all over the world. |
しかし文明が発達し人口も徐々に増え、国家や領土という社会構造が出来るにつれ、世界中で大規模な争いが起きるようになってゆく。 |