Several sources mention the Mongols deploying firearms and gunpowder weapons against European forces at the Battle of Mohi in various forms, including bombs hurled via catapult.[55][56][57] Professor Kenneth Warren Chase credits the Mongols for introducing gunpowder and its associated weaponry into Europe.[58] A later legend arose in Europe about a mysterious Berthold Schwarz who is credited with the invention of gunpowder by 15th- through 19th-century European literature.[59]