Both European Societies and Japanese Samurais had and hereditary system of classes. The warriors were the most important class in both of them, in Japan called samurai and in Europe called knights that served the lords of the local, and had some codes about moral an ethic.
Knights had a military rank, Samurais did not.
The answer is : Communist insurgent
Leo III initiated a ban on the use of images for worship
Leo III accomplished many military milestones which made him popular and also gave him the confidence to pursue his religious policies. By banning the use of religious images, Leo II provoked a century of conflict within the empire