Reinforced by 12,000 men, the marshal concealed himself in the forest of Schonberg, where he again attacked the Prussians, whose whole line of march became "one battle;" but Prince Henry, Frederick's brother, commanded the rear-guard; and so excellent were his dispositions, that only Lieutenant-General Bulow and 215 soldiers fell.
On the 1st November, Frederick began his march for Silesia. Loudon, still pressing on, fell with such fury on the rear-guard, that he was nearly taken prisoner by the Prussian hussars. He then brought up his cannon; but these were dismounted by the heavier pieces of Frederick, which at the same time threw the Austrian foot into disorder. Thrice Loudon rallied them; and thrice, sword in hand, he led them to the charge: but the approach of the noble Putkammer hussars compelled him to fall back; and thus, amid skirmishes, night marches, toil, starvation, plunder, and devastation, the campaign of the year was closed by the Austrians raising the sieges of Neiss and Dresden, and the King of Prussia retiring to winter quarters at Breslau.
The generals of the Imperial army usually spent the winter in the Austrian capital; and now the Empress expressed a strong desire to see Marshal Loudon, of whom Count Daun had written so favourably in all his despatches and letters. Thus he prepared to return to Vienna, but was compelled to remain for some time at Dœplitz in Bohemia, in consequence of a return of his illness: and there Madame Loudon, who had remained at Vienna during the whole war, arrived to attend him. As soon as he was sufficiently restored, they travelled together to the capital, where they arrived on the 24th of February, 1759. The streets were crowded by dense masses of persons, all anxious to behold and to welcome the hero of whom they had heard so much, and his reception was most enthusiastic. Only two years had elapsed since he left that city as a field-officer of Croats, and now he returned to it a Lieutenant-Field-Marshal and Knight of Maria Theresa.
From the fair Empress he received the most flattering distinction; and she commanded her own physician, the Baron Von Swieten, to attend him until his health was completely re-established. She bestowed upon him the Grand Cross of her Order, and created him a Baron of the Holy Roman Empire.
The moment his physician permitted him, he resumed his command; and no general of the Seven Years' War bore a more distinguished part in the campaign of 1759 than Baron Loudon, though Frederick II., who had imbibed an animosity to him, always mentions his name slightingly in his works.
The Prussian monarch, in the beginning of the year, had great success; but his chief embarrassment was the approach of the Russians, who defeated him in Silesia on the 23rd July, and spread their outposts along the banks of the Oder. On the frontiers of Bohemia nothing of importance occurred, though Loudon, who occupied Trautenau, was continually in motion, alarming the Prussian posts and cutting off their supplies.
He made an attack on General Seidlitz near Frederick's strong camp at Schmuckseiffen, and lost 150 men. Immediately after this, the Court of Vienna gave him command of 20,000 men, 1200 of whom were dragoons, to give vigour to their Russian allies, who were destitute of cavalry. By the way of Greiffenberg he marched through Silesia, foiling, deceiving, and skirmishing with the horse of Prince Henry, till he took up a position on the heights of Laubau, where he had fought the Prussians in the preceding year. He chose this ground with the intention of being in advance of them now, when he should receive orders to join the Russians under Count Soltikow.
With this general he achieved a junction, and together they took up a position at Cunnersdorff, opposite Frankfort-on-the-Oder, and gave battle to Frederick at eleven o'clock, A.M., on the 12th of August. The Russians had their intrenchments stormed amid great slaughter; a starfort erected by them on two sand hills, to cover their right flank, was carried at the point of the bayonet, and a dreadful massacre of them ensued in the churchyard of Cunnersdorff. Under the glare of a burning sun, and sore with many a wound, the brave King of Prussia led on his troops; and for two hours the infantry fought hand to hand. The Jews' Cemetery, seven redoubts, and 180 pieces of cannon, were already taken, when Loudon, perceiving that the Russians were unable to maintain their ground, brought up his well-chosen reserves, and fired his field-pieces loaded with case-shot, to sweep the Prussian line. He then charged on both flanks with his fine Austrian cavalry, who bore down all before them. The Prussians fell into confusion, and their rout became total. Frederick had two horses shot under him, and his blue uniform literally torn to rags by bullets and sword-cuts. The struggle was awful, and night came down on a field where 30,000 men lay dead or dying, and of these more than the half were Prussians. The brave Putkammer was slain, and ten other generals lay killed or wounded near him.
The movements of Frederick after this most signal defeat were of a masterly description. He soon compelled Loudon and Soltikow to act on the defensive, and recovered every place in the Saxon Electorate except Dresden. Forcing the Russians to retire into Poland, he joined his brother Prince Henry in Saxony, compelled Marshal Daun to retreat as far as Plawen, and forced him to take shelter in the camp at Pirna; after which he retired into winter quarters in November.
For his victory at Cunnersdorff Loudon was raised to the rank of General-velt-zeug-Meister; but he drew off from Soltikow with all his cavalry immediately after the battle.