On the 10th of August, Lacy lost his tents and baggage when escaping an attack meditated by Frederick, who was baffled by the timely arrival of Daun at Hennersdorf. Marshal Loudon invested Breslau, but raised the siege on Prince Henry of Prussia marching to its relief. Frederick then made his memorable march to prevent the Russians from forming a junction with Daun and Lacy; he passed five rivers, the Elbe, the Spree, the Neiss, the Quiess, and the Bober, though trammelled by 2000 caissons and a ponderous train of artillery; but he was unable to bring Loudon to action before that general was joined by Lacy and Daun. The three leaders then encompassed his camp at Lignitz, and his affairs seemed desperate; for Daun, after a reconnoisance, announced to Lacy and Loudon his resolution of storming the Prussian position by a night attack; but the subtle Frederick eluded them all, by suddenly and secretly passing the Elbe, and hastening into Saxony, whither Daun and Lacy followed him, at the head of 80,000 men. Then Cunnersdorf, the bloodiest battle of the Seven Years' War, was fought and lost by Frederick. In that field he had 20,000 of his soldiers slain, and all his generals killed or wounded. He made incredible exertions to retrieve the day, and his uniform was riddled by musket-balls. The Russians passed the Oder, and pushed a strong column into Brandenburg, under Count Czernichew, who was joined by a large body of Austrians under Lacy, and together they made themselves masters of Berlin, the capital, about the end of October. They levied a severe contribution upon the citizens, destroyed all the magazines, arsenals, and foundries, pillaged the royal palaces, and ravaged all the adjacent country, burning a vast amount of property and military stores; but they retired by different routes on hearing that the mortified Frederick was advancing to the relief of his plundered capital. And soon after he had his revenge at the battle fought near Toorgau, on the 23rd of November. There Lacy commanded the reserve of 20,000 men, who covered the causeway and several ponds which lay at the extremity of Daun's position, and on which his left flank rested; Lacy endured a severe cannonade at the beginning of the action. General Count O'Donnel commanded the cavalry. When Daun gave way, Lacy brought up his reserve, and twice with the bayonet he strove desperately and heroically to regain the day, but was twice driven back by the Prussians; nor did he abandon that disastrous field until half-past nine in the dark November evening. By that time Daun, after receiving a shot in the thigh, had been borne away wounded, and O'Donnel had assumed the command of the broken and discomfited army.