Maria Theresa, greatly elated by her success in driving the Prussians out of Bohemia, resolved immediately, notwithstanding the severity of the season, to push her armies through the “Giant Mountains” for the reconquering of Silesia. She ordered her generals to press on with the utmost energy and overrun the whole country. At the same time she issued a manifesto, declaring that the treaty of Breslau was a treaty no longer; that the Silesians were absolved from all oaths of allegiance to the King of Prussia, and that they were to hold themselves in readiness to take the oath anew to the Queen of Hungary. On the 18th of December a strong Austrian army entered Silesia and took possession of the country of Glatz. The Prussian troops were withdrawn in good order to their strong fortresses on the Oder. The old Prince Leopold, the cast-iron man, called the Old Dessauer, the most inflexible of mortals, was left in command of the Prussian troops. He was, however, quite seriously alienated from Frederick. A veteran soldier, having spent his lifetime on fields of blood, and having served the monarchs of Prussia when Frederick was but a child, and who had been the military instructor of the young prince, he deemed himself entitled to consideration which an inexperienced officer might not command. In one of the marches to which we have referred, Leopold ventured to take a route different from that which Frederick had prescribed to him. In the following terms the Prussian king reprimanded him for his disobedience: “I am greatly surprised that your excellency does not more accurately follow my orders. If you were more skillful than Cæsar, and did not with strict fidelity obey my directions, all else were of no help to me. I hope this notice, once for all, will be enough, and that in future you will give no cause for complaint.” Prince Leopold was keenly wounded by this reproof. Though he uttered not a word in self-defense, he was ever after, in the presence of his majesty, very silent, distant, and reserved. Though scrupulously faithful in every duty, he compelled the king to feel that an impassable wall of separation had risen up between them. He was seeking for an honorable pretext to withdraw from his majesty’s service. Frederick had hardly reached Berlin ere he was astonished to learn, from dispatches from the Old Dessauer, that the Austrians, not content with driving him out of Bohemia, had actually invaded Silesia. Amazed, or affecting amazement, at such audacity, he sent reiterated and impatient orders to his veteran general to fall immediately upon the insolent foe and crush him. “Hurl them out,” he wrote. “Gather twenty, thirty thousand men, if need be. Let there be no delay. I will as soon be pitched out of Brandenburg as out of Silesia.”