sentences:  Expeditionary warfare in East Asia began very much in the same way it had in the Mediterranean with short-term raids by Japanese pirates.Because the Wokou were weakly resisted by the Ming Dynasty, the raiding eventually developed into fully-fledged expeditionary warfare with the Japanese invasions of Korea (1592–1598).The development in expeditionary operations reached a new level when during the Crusades the element of political alliance as an influence on the military strategy was introduced, for example in the Sixth Crusade (AD 1228.)