French, Bavarian, Wurtemberg, and Saxon troops,[7] and despatched Lauriston and Ney toward Berlin; but the former encountering the Russians under Barclay de Tolly at Konigswartha, and the latter the Prussians under York at Weissig, both were constrained to retreat. Napoleon attacked the position at Bautzen from the 19th to the 21st of May, but was gloriously repulsed by the Prussians under Kleist, while Blücher, who was in danger of being completely surrounded, undauntedly defended himself on three sides. The allies lost not a cannon, not a single prisoner, although again compelled to retire before the superior forces of the enemy. The French had suffered an immense loss; eighteen thousand of their wounded were sent to Dresden. Napoleon's favorite, Marshal Duroc, and General Kirchner, a native of Alsace, were killed, close to his side, by a cannon ball. The allied troops, forced to retire after an obstinate encounter, neither fled nor dispersed, but withdrew in close column and repelling each successive attack.[8] The French avant-garde under Maison was, when in close pursuit of the allied force, almost entirely cut to pieces by the Prussian cavalry, which unexpectedly fell upon it at Heinau. The main body of the Russo-Prussian army, on entering Silesia, took a slanting direction toward the Riesengebirge and retired behind the fortress of Schweidnitz. In this strong position they were at once partially secure from attack, and, by their vicinity to the Bohemian frontier, enabled to keep up a communication, and, if necessary, to form a junction with the Austrian forces. The whole of the lowlands of Silesia lay open to the French, who entered Breslau on the 1st of June.[9] Berlin was also merely covered by a comparatively weak army under General Bulow,[10] who, notwithstanding the check given by him to Marshal Oudinot in the battles of Hoyerswerda and Luckau, was not in sufficient force to offer assistance to the main body of the French in case Napoleon chose to pass through Berlin on his way to Poland. Napoleon, however, did not as yet venture to make use of his advantage. By the seizure of Prussia and Poland, both of which lay open to him, the main body of the allied army and the Austrians, who had not yet declared themselves, would have been left to the rear of his right flank and could easily have cut off his retreat. His troops, principally young conscripts, were moreover worn out with fatigue, nor had the whole of his reinforcements arrived. To his rear was a multitude of bold partisans, Tettenborn, the Hanseatic legion, Czernitscheff, who, at Halberstadt, captured General Ochs together with the whole of the Westphalian corps and fourteen pieces of artillery, Colomb, the Herculean captain of horse, who took a convoy and twenty-four guns at Zwickau, and the Black Prussian squadron under Lutzow. Napoleon consequently remained stationary, and, with a view of completing his preparations and of awaiting the decision of Austria,