<P> During the invasion of Transoxania in 1219 , along with the main Mongol force , Genghis Khan used a Chinese specialist catapult unit in battle ; they were used again in 1220 in Transoxania . The Chinese may have used the catapults to hurl gunpowder bombs , since they already had them by this time . While Genghis Khan was conquering Transoxania and Persia , several Chinese who were familiar with gunpowder were serving with Genghis 's army . Historians have suggested that the Mongol invasion had brought Chinese gunpowder weapons to Central Asia . One of these was the huochong , a Chinese mortar . </P>
<P> During the invasion of Transoxania in 1219 , along with the main Mongol force , Genghis Khan used a Chinese specialist catapult unit in battle ; they were used again in 1220 in Transoxania . The Chinese may have used the catapults to hurl gunpowder bombs , since they already had them by this time . While Genghis Khan was conquering Transoxania and Persia , several Chinese who were familiar with gunpowder were serving with Genghis 's army . Historians have suggested that the Mongol invasion had brought Chinese gunpowder weapons to Central Asia . One of these was the huochong , a Chinese mortar . </P>
. in 1219 which mongol king attacked trans oxania
. in 1219 which mongol king attacked trans oxania
Genghis Khan
Genghis Khan