Military Communication of Feudal Japan

A variety of methods were used to communicate across the battlefield in feudal Japan, much like in any other culture. These methods included visual signals like flags and banners and audible signals using drums and horns. Messengers on horseback used ciphers and other methods to prevent their messages from falling into the wrong hands. By the beginning of the Sengoku Period, battlefield communications had become fairly complicated affairs, with larger armies than ever before, and a multitude of flags and banners covered in a myriad of colors and designs.
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