True to his practice of boldly meeting an impending danger, Frederick preferred to open hostilities himself, rather than leave it to his enemies. Why should he hesitate to kindle the flames of war in the land of so bitter an enemy as the Elector of Saxony (also King of Poland) had shown himself to be? Without any formal declaration having been made, therefore, he proceeded to invade Saxony with an army of sixty thousand men in three divisions. His advance, as usual, was rapid; all places of importance were seized, and on September 10, 1756, he entered Dresden. The Elector fled to the fortress of Königstein, which was considered impregnable, and at the foot of which the Saxon army of seventeen thousand men, all told, was in position. The Queen alone remained in Dresden. She had the key to the secret archives, and when Frederick ordered them to be seized she placed herself before the door of the room in which they were kept, declaring they should never be taken except by force. She was pushed aside, however, the chests were broken open, and Frederick found the documents, copies of which had been sent him by the traitor already mentioned, and which furnished proof of the secret alliance against him. With the exception of this violence, which, in truth, the august lady had brought upon herself, she was treated with the greatest respect. The poor country fared worse. Although pillage was strictly forbidden, Saxony had to bear all the oppression of a conquered country and meet levies of all kinds. Frederick emptied the arsenals, confiscated all the state revenues, and treated Saxony as if it were part of his own dominions; but he spared the people wherever it was possible. Ignoring the protests of the Emperor and also of France, he pursued his own course, and worked for his own ends firmly and resolutely. The position which the Saxon troops held at the foot of Königstein was unassailable. The only way to vanquish them was by starvation, so the King left them well surrounded and marched with his army into Bohemia to prevent any assistance reaching the Saxons from that quarter. There were two Austrian armies in Bohemia—one under the command of Marshal Browne, at Kollin; the other under General Piccolomini at Olmütz, and later at Königgrätz. Browne was Saxony’s nearest hope of rescue; but Frederick’s sudden and unexpected appearance in Bohemia took him by surprise and found him unprepared for action. Several weeks elapsed, in fact, before he was ready to move, and Frederick made good use of the time. Moreover, the Minister of War, regarded as the most conservative of the Austrian field-marshals, wished to spare the army as much as possible, and to threaten Frederick for the advantage of Saxony without exposing it to long marches and changes of position.