Schweidnitz was strictly blockaded during the winter. On the 15th of March, the weather being still cold, wet, and stormy, Frederick marched from Breslau to attack the place. His siege artillery was soon in position. With his accustomed impetuosity he commenced the assault, and, after a terrific bombardment of many days, on the night of the 15th of April took the works by storm. The garrison, which had dwindled from eight thousand to four thousand five hundred, was all captured, with fifty-one guns, thirty-five thousand dollars of money, and a large quantity of stores. Thus the whole of Silesia was again in the hands of Frederick.
It was supposed that his Prussian majesty would now march southwest for the invasion of Bohemia. Austria made vigorous preparations to meet him there. Much to the surprise and bewilderment of the Austrians, the latter part of April Frederick directed his columns toward the southeast. His army, about forty thousand strong, was in two divisions. By a rapid march through Neisse and Jagerndorf he reached Troppau, on the extreme southern frontier of Silesia. He then turned to the southwest. It was again supposed that he intended to invade Bohemia, but from the east instead of from the north.
General Daun, in command of the Austrian forces, rapidly concentrated his troops around Leutomischel, where he had extensive magazines. But Frederick, leaving Leutomischel far away on his right, pressed forward in a southerly direction, and on the 12th of May appeared before Olmütz. His march had been rapidly and admirably conducted, dividing his troops into columns for the convenience of road and subsistence.
Olmütz was an ancient, strongly fortified city of Moravia, pleasantly situated on the western banks of the Morawa River. It had been the capital of Moravia, and contained about ten thousand inhabitants. The place subsequently became renowned from the imprisonment of Lafayette in its citadel for many years. The city had become an arsenal, and one of the most important military store-houses of Austria.
Olmütz was ninety miles from Troppau, in Silesia, where Frederick had established his base of supplies. This was a long line of communication to protect. General Daun, with a numerous Austrian army, all whose movements were veiled by clouds of those fleet and shaggy horsemen called Pandours, was forty miles to the west, at Leutomischel. Cautious in the extreme, nothing could draw him into a general battle. But he watched his foe with an eagle eye, continually assailing his line of communication, and ever ready to strike his heaviest blows upon any exposed point.
The king’s brother Henry was in command in Saxony, at the head of thirty thousand troops. Frederick wrote to him the characteristic and very judicious advice, “Do as energetically as possible whatever seems wisest to you. But hold no councils of war.”
The plan of his Prussian majesty was bold and sagacious. He supposed that he could easily take Olmütz. Availing himself of the vast magazines to be found there, he would summon his brother Henry to join him by a rapid march through Bohemia, and with their combined force of sixty thousand troops they would make a rush upon Vienna. The Austrian capital was distant but about one hundred miles, directly south. As the Austrian army was widely dispersed, there were but few impediments to be encountered. The success of this plan would compel the allies to withdraw their forces from the territories of the King of Prussia, if it did not enable Frederick to dictate peace in the palaces of Maria Theresa.
Olmütz was found very strongly fortified. It was so situated that, with the force Frederick had, it could not be entirely invested. Baron Marshal, a very brave and energetic old man, sixty-seven years of age, conducted the defense.
SIEGE OF OLMÜTZ, MAY 12—JULY 2, 1758.