Description1639 Ming crossbow volley formation.jpg
English: This depiction of a crossbow volley formation appears in Bi Maokang's famous illustrated manual of military weaponry, the Jun qi tu shuo (軍器圖說). It is notable for the nearly identical image of musketeers in the same book, illustrating the similarities of the Chinese countermarch techniques between crossbows to firearms. From Bi Maokang 畢懋康, Jun qi tu shuo 軍器圖說, ca. 1639.
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