Changdao

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Changdao (Traditional Chinese: 長刀; Simplified Chinese: 长刀) was a type of anti-cavalry sword that was used in China during the Ming Dynasty. Sometimes called Miao dao (a similar but more recent weapon), the blade greatly resembles a Japanese ōdachi in form. Indeed some feel that the design of the changdao was drawn from exposure to the long swords of Japanese pirates along China's south-eastern coast. This weapon was adopted by General Qi Jiguang, who acquired a Kage-ryu manual from japanese wokou, studied and modified it for his troops and used against enemies on the Mongol border circa 1560. It replaced the zhǎn mǎ dāo as a "horse slaying" weapon; it is interesting to note that as the Japanese blades may have been derivatives of the zhǎnmǎdāo, the changdao would effectively be a third-generation replacement of the original sword. At the time of General Qi it had a specified length of 1.95 meters, which rivaled the Japanese ōdachi in length. Its handle was long, apparently slightly more than one third of its total length, and its curve more shallow than that of Japanese swords. Commanding up to 100,000 troops on the Mongol border, General Qi found this so effective that up to forty percent of his commandos had it as a weapon; it stayed in service throughout the late Ming dynasty.