In 1759, Korean Crown Prince Sado compiled the Muye Sinbo — the New Compendium of Martial Arts — expanding his nation's military playbook from six foundational combat skills to eighteen distinct fighting methods. The original six skills had been codified in the 1610 Muyebo following Korea's devastating losses in the Imjin War of 1592–1598, when the existing military infrastructure crumbled against invasion and King Seonjo was forced to adopt the training models of Chinese general Qi Jiguang. Prince Sado's twelve additions drew from Chinese, Japanese, and native Korean traditions in a remarkably pragmatic act of cross-cultural synthesis: a Chinese-style moon blade for open-field sweeping attacks, a Japanese-style spear blade for swift thrusting, a one-handed naval sword designed for the cramped chaos of ship-deck combat, ingeniously engineered twi ...