Dao (sword) - Yuan, Ming and Qing

Yuan, Ming and Qing

With the Mongol invasion of China in the early 13th century and the formation of the Yuan dynasty, the curved steppe curved saber became a greater influence on Chinese sword designs. Sabers had been used by Turkic, Tungusic, and other steppe peoples of Central Asia since at least the 8th century CE, and it was a favored weapon among the Mongol aristocracy. Its effectiveness for mounted warfare and popularity among soldiers across the entirety of the Mongol empire had lasting effects.

In China, Mongol influence lasted long after the collapse of the Yuan dynasty at the hands of the Ming, continuing through both the Ming and the Qing dynasties (the latter itself founded by a steppe people, the Manchu), furthering the popularity of the dao and spawning a variety of new blades. Blades with greater curvature became popular, and these new styles are collectively referred to as pei dao. During the mid-Ming these new sabers would completely replace the jian as a military-issue weapon. The four main types of pei dao are:

• yanmao dao, or "goose-quill saber." This weapon, similar to the earlier zhibei dao, is largely straight, with a curve appearing at the center of percussion near the blade's tip. This allows for thrusting attacks and overall handling similar to that of the jian, while still preserving much of the dao's strengths in cutting and slashing.
• liuye dao, the "willow leaf saber." The most common form of Chinese saber, this weapon features a moderate curve along the length of the blade. This weapon became the standard sidearm for both cavalry and infantry, and is the sort of saber originally used by many schools of Chinese martial arts.
• pian dao, "slashing saber." A deeply curved dao meant for slashing and draw-cutting, this weapon bears a strong resemblance to the shamshir and scimitar. A fairly uncommon weapon, it was generally used by skirmishers in conjunction with a shield.
• niuweidao, the "oxtail saber." A heavy bladed weapon with a characteristic flaring tip, this is the archetypal "Chinese broadsword" of kung fu movies today. It is first recorded in the early 19th century (the latter half of the Qing dynasty) and only as a civilian weapon: there is no record of it being issued to troops, and it does not appear in any listing of official weaponry. Its appearance in movies and modern literature is thus often anachronistic.

Besides these four major types of dao, the duan dao or "short dao" was also used, this being a compact weapon generally in the shape of a liuye dao. The dadao saw continued use, and during the Ming dynasty the large two-handed changdao and zhanmadao were used both against the cavalry of the northern steppes and the wokou (pirates) of the southeast coast; these latter weapons (sometimes under different names) would continue to see limited use during the Qing period. Also during the Qing there appear weapons such as the nandao, regional variants in name or shape of some of the above dao, and more obscure variants such as the "nine ringed broadsword," these last likely invented for street demonstrations and theatrical performances rather than for use as weapons.

The Chinese spear and dao (liuyedao and yanmaodao) were commonly issued to infantry due to the expense of and relatively greater amount of training required for the effective use of Chinese straight sword, or jian. Dao can often be seen depicted in period artwork worn by officers and infantry.

During the Yuan dynasty and after, some aesthetic features of Persian, Indian, and Turkish swords would appear on dao. These could include intricate carvings on the blade and "rolling pearls": small metal balls that would roll along fuller-like grooves in the blade.