FORE:It will be remembered that Prince Charles was at the head of a strong Austrian army, on the western banks of the Rhine. It numbered over fifty thousand combatants. The King of France had pledged himself to press them closely, so that they could not recross the Rhine and rush into Bohemia to thwart the operations of Frederick; but, unfortunately, Louis XV. was seized with a malignant fever, which brought him near to the grave. Taking advantage of this, Prince Charles, on the night of the 23d of August, crossed the Rhine with his whole army. It was bright moonlight, so that every movement was as visible as if it had been made by day. But the French officers, glad thus to be rid of the Austrian army, preferring much that Frederick334 should encounter it in Bohemia than that they should struggle against it on the Rhine, went quietly to their beds, even forbidding the more zealous subalterns from harassing Prince Charles in his passage of the river. It was then the great object of the French to take Freyburg. The withdrawal of Prince Charles, with his fifty thousand men, was a great relief to them.478 The latter part of June, an army of a hundred thousand Russians, having crossed the Vistula, was concentrated, under General Soltikof, at Posen, on the River Warta, in Poland. They were marching from the northeast to attack the Prussian forces near Landshut in their rear. General Daun, with a still larger force of Austrians, was confronting Frederick on the southwest. The plan of the allies was to crush their foe between these two armies. Frederick had lost the ablest of his generals. The young men who were filling their places were untried.