In this first general war of the Germans and their allies against Louis, Frederick William proved the only one of their leaders seriously to be feared. Louis made an alliance with Sweden and persuaded the Swedes to overrun Brandenburg during its ruler's absence with his forces on the Rhine. But so firmly had the Great Elector established himself at home, so was he loved, that the very peasantry rose to his assistance. "We are only peasants," said their banners, "but we can die for our lord." Pitiful cry! Pitiful proof of how unused the commons were to even a little kindness, how eagerly responsive! Frederick William came riding like a whirlwind from the Rhine, his army straggling along behind in a vain effort to keep up. He hurled himself with his foremost troops upon the Swedes, and won the celebrated battle of Fehrbellin. He swept his astonished foes back into their northern peninsula. Brandenburg became the chief power of northern Germany.[1] [Footnote 1: See _Growth of Prussia under the Great Elector: His Victory at Fehrbellin_, page 138.] In 1679 the Peace of Ryswick ended the general war, and left Holland unconquered, but with the French frontier extended to the Rhine, and Louis at the height of his power, the acknowledged head of European affairs. Austria was under the rule of Leopold I, Emperor of Germany from 1657 to 1705, whose pride and incompetence wholly prevented him from being what his position as chief of the Hapsburgs would naturally have made him, the leader of the opposition, the centre around whom all Europe could rally to withstand Louis's territorial greed. Leopold hated Louis, but he hated also the rising Protestant "Brandenburger," he hated the "merchant" Dutch, hated everybody in short who dared intrude upon the ancient order of his superiority, who refused to recognize his impotent authority. So he would gladly have seen Louis crush every opponent except himself, would have found it a pleasant vengeance indeed to see all these upstart powers destroying one another. Moreover, Austria was again engaged in desperate strife with the Turks. These were in the last burst of their effort at European conquest. No longer content with Hungary, twice in Leopold's reign did they advance to attack Vienna. Twice were they repulsed by Hungarian and Austrian valor. The final siege was in 1683. A vast horde estimated as high as two hundred thousand men marched against the devoted city. Leopold and most of the aristocracy fled, in despair of its defence. Only the common people who could not flee, remained, and with the resolution of despair beat off the repeated assaults of the Mahometans.[2] [Footnote 2: See _Last Turkish Invasion of Europe: Sobieski Saves Vienna_, page 164.]