Since the first junks appeared, under antiquity, probably from 1500 to 2000 BC. JC., Their various users have constantly armed them, even if only with a few white weapons, to face the pirates who infested the intense trade routes between China and South-East Asia, and up to India. But the first real war junks specifically conceived as such probably only existed with the widespread use of explosive black powder at the end of the thirteenth century. The "muskets" and the first heavy guns were quickly adapted to junks specially adapted to the tracking of pirates. Some of them, such as the one above, carry at the same time flares at the front, more destined to provoke fear than as offensive arms, and numerous light cannons, passing through small ports, embrasures of bulwarks.
As in the West, speed was quickly judged as a determining criterion, and the junks of war were also characterized by their finer shapes and lesser weight: The abandonment of billowing holds to maximize wearing was very much the case. The wing was also larger at the surface. Jonks like these were part of Zheng He's expeditions around the world in the early 14th century. These junks of war were still, in 1870, when China began to equip Western ships, the main units of the fleets of maritime governors. Their cannon, like that of the forts, had scarcely evolved since the Middle Ages, and made more noise than that of evil.