In 1757 a confederacy was completed to punish Frederick of Prussia for his invasion of Saxony. France sent 80,000 men to the Rhine, under the Marshal d'Estrees; 60,000 Russians threatened Livonia; the Swedes gathered on the Pomeranian frontier; and Maria Theresa mustered 150,000 soldiers, the most of whom were stationed in Prague, under Prince Charles of Lorraine and the Marshals Brown and Daun. The Austrians were then formed into four divisions--one under Marshal Brown, at Budyn; a second under the Duke d'Aremberg, at Egra; a third under Count Konigsegg, at Richtenberg; a fourth under Marshal Daun, in Moravia. Undeterred by this vast array against him, Frederick in April marched straight upon Prague, and driving before him a column under Marshal Schwerin, attacked Brown at Budyn, before Daun's division could join him from Moravia. On finding his flank turned, Brown fell back upon the Bohemian capital, and Frederick, leaving one division of his army under Marshal Keith, followed him fast with the rest, and gave battle to the Austrians on the 6th of May, at dawn in the morning. The Imperialists under Marshal Brown were 80,000 strong; his left wing rested on the Ziskberg towards Prague; his right on the hill of Sterboli. In the front were steep and craggy mountains, which no cavalry could climb or artillery traverse; but the deep vale at their foot was lined by hussars and hardy Hungarian infantry. The battle was commenced by Lieutenant-General the Prince of Schonaich assailing the Austrian right with sixty-five squadrons of cavalry; a movement which Brown skilfully repulsed by drawing off his cavalry from the left, and overwhelming the prince by the united rush of one hundred and four squadrons. Thus outflanked, they were repulsed, after two charges, until General Zeithen hurled the Austrians back upon their infantry by a magnificent charge of twenty squadrons of hussars.