During the Battle of Mohi for example, while the Hungarian light cavalry and infantry were decimated by Mongol forces, the heavily armored knights in their employ (such as the Knights Templar) fought significantly better. During the Battle of Legnica, the Knights Templar that numbered between 65-88 during the battle lost only three knights and 2 sergeants. Austrian knights under Duke Frederick also fared better in fighting the Mongol invasion in Vienna. King Béla IV hired the help of the Knights of St. John, as well as training his own better-armed local knights, in preparation for the Second Mongol invasion of Hungary. In the decades following the Mongolian raids on European settlements, Western armies (particularly Hungary) started to adapt to the Mongol tactics by building better fortifications against siege weapons and improving their heavy cavalry. After the division of the Mongol Empire into four fragments, when the Golden Horde attempted the next invasion of Hungary, Hungary had increased their proportion of knights (led by Ladislaus IV of Hungary) and they quickly defeated the main Golden Horde Army in the hills of western Transylvania. By this time as well, many Eastern and Central European countries had ended their hostilities with one another and united to finally drive out the remnants of the Golden Horde. Guerrilla warfare and stiff resistance also helped many Europeans, particularly those in Croatia and Dzurdzuketia, in preventing the Mongols from setting a permanent hold and driving them off. 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. Professor Kenneth Warren Chase credits the Mongols for introducing gunpowder and its associated weaponry into Europe. 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. In "A History of the English-Speaking Peoples", Winston Churchill wrote:  But Asia too was marching against the West. At one moment it had seemed as if all Europe would succumb to a terrible menace looming up from the East. Heathen Mongol hordes from the heart of Asia, formidable horsemen armed with bows, had rapidly swept over Russia, Poland, Hungary, and in 1241 inflicted simultaneous crushing defeats upon the Germans near Breslau and upon European cavalry near Buda. Germany and Austria at least lay at their mercy. Providentially in this year the Great Khan died in Mongolia; the Mongol leaders hastened back the thousands of miles to Karakorum, their capital, to elect his successor, and Western Europe escaped.