Samurai armor has long been associated with authority and prestige in Japan. Samurai armor defined the samurai lifestyle and marked the art of warfare in Japan. Despite minor design changes, the principles remained the same: protect the samurai and display the wealth and social status of the clan to which they belonged. Thus, all samurai armor is similar in some ways, but there are some fundamental differences between samurai armor and that of the daimyo, the rulers of the various fiefdoms who led the clans. While there are no distinguishing marks that can be used to identify daimyo armor, they had to stand out from other samurai in order to be recognized and assert their social status. Furthermore, daimyo had to choose armor that distinguished them from other clans and expressed their political and economic power in order to express their clan's wealth and status. This is especially true of Edo-era samurai armor, when daimyo armor echoed medieval models with a wider range of materials and more elaborate details. Because there was no need to go to the battlefield during the Edo period, most daimyo armor was larger and heavier than common samurai armor. Daimyo armor was simpler during the Sengoku Jidai period, when the clans were actually at war with each other. The daimyo desired high-quality armor, but they had fewer resources and wealth than the Edo period, and they had to lead armies while wearing the armor, which had to be comfortable and effective for the daimyo's defense.