In this period each country appointed thinkers called Shoshi-hyakka (general term of scholars and schools in China), and they introduced new weapons, such as Cavalry Operations and chariots, and conducted military reforms.
この時代には各国が諸子百家と呼ばれる思想家たちから人材を登用し、騎馬戦術やチャリオットなどの新兵器を導入して軍事改革を行った。