During the Middle Age, influential maritime forces called zenki-wako (early Japanese pirates) threatened East Asia, and the Korean Dynasty was obliged to take various countermeasures including the dispatch of troops, attempts to conciliate the pirates, and requests for suppression of the pirates sent to the Muromachi bakufu (Japanese feudal government headed by a shogun).
中世東アジアにおいて倭寇前期倭寇と呼ばれる海上勢力が猛威を奮い、朝鮮王朝は討伐・懐柔・室町幕府への鎮圧要請など、様々な対応を余儀なくされる。