Nor were the effects produced by that celebrated day merely political. The greatest masters of German poetry and eloquence have admitted that, though the great King neither valued nor understood his native language, though he looked on France as the only seat of taste and philosophy, yet, in his own despite, he did much to emancipate the genius of his countrymen from the foreign yoke; and that, in the act of vanquishing Soubise, he was, unintentionally, rousing the spirit which soon began to question the literary precedence of Boileau and Voltaire. So strangely do events confound all the plans of man. A prince who read only French, who wrote only French, who aspired to rank as a French classic, became, quite unconsciously, the means of liberating half the Continent from the dominion of that French criticism of which he was himself, to the end of his life, a slave. Yet even the enthusiasm of Germany in favour of Frederic hardly equalled the enthusiasm of England. The birthday of our ally was celebrated with as much enthusiasm as that of our own sovereign; and at night the streets of London were in a blaze with illuminations. Portraits of the Hero of Rosbach, with his cocked hat and long pigtail, were in every house. An attentive observer will, at this day, find in the parlours of old-fashioned inns, and in the portfolios of print-sellers, twenty portraits of Frederic for one of George the Second. The sign-painters were everywhere employed in touching up Admiral Vernon into the King of Prussia. This enthusiasm was strong among religious people, and especially among the Methodists, who knew that the French and Austrians were Papists, and supposed Frederic to be the Joshua or Gideon of the Reformed Faith. One of Whitfield's hearers, on the day On which thanks for the battle of Leuthen were returned at the Tabernacle, made the following exquisitely ludicrous entry in a diary, part of which has come down to us: "The Lord stirred up the King of Prussia and his soldiers to pray. They kept three fast days, and spent about an hour praying and singing psalms before they engaged the enemy. O! how good it is to pray and fight!" Some young Englishmen of rank proposed to visit Germany as volunteers, for the purpose of learning the art of war under the greatest of commanders. This last proof of British attachment and admiration, Frederic politely but firmly declined. His camp was no place for amateur students of military science. The Prussian discipline was rigorous even to cruelty. The officers, while in the field, were expected to practise an abstemiousness and self-denial such as was hardly surpassed by the most rigid monastic orders. However noble their birth, however high their rank in the service, they were not permitted to eat from anything better than pewter. It was a high crime even in a count and field-marshal to have a single silver spoon among his baggage.
Gay young Englishmen of twenty thousand a year, accustomed to liberty and luxury, would not easily submit to these Spartan restraints. The King could not venture to keep them in order as he kept his own subjects in order. Situated as he was with respect to England, he could not well imprison or shoot refractory Howards and Cavendishes. On the other hand, the example of a few fine gentlemen, attended by chariots and livery servants, eating in plates, and drinking champagne and Tokay, was enough to corrupt his whole army. He thought it best to make a stand at first, and civilly refused to admit such dangerous companions among his troops.
The help of England was bestowed in a manner far more useful and more acceptable. An annual subsidy of near seven hundred thousand pounds enabled the King to add probably more than fifty thousand men to his army. Pitt, now at the height of power and popularity, undertook the task of defending Western Germany against France, and asked Frederic only for the loan of a general. The general selected was Prince Ferdinand of Brunswick, who had attained high distinction in the Prussian service. He was put at the head of an army, partly English, partly Hanoverian, partly composed of mercenaries hired from the petty princes of the empire. He soon vindicated the choice of the two allied Courts, and proved himself the second general of the age.
Frederic passed the winter at Breslau, in reading, writing, and preparing for the next campaign. The havoc which the war had made among his troops was rapidly repaired; and in the spring of 1758 he was again ready for the conflict. Prince Ferdinand kept the French in check. The King in the meantime, after attempting against the Austrians some operations which led to no very important result, marched to encounter the Russians, who, slaying, burning, and wasting wherever they turned, had penetrated into the heart of his realm. He gave them battle at Zorndorf, near Frankfort on the Oder. The fight was long and bloody. Quarter was neither given nor taken; for the Germans and Scythians regarded each other with bitter aversion, and the sight of the ravages committed by the half savage invaders, had incensed the King and his army. The Russians were overthrown with great slaughter; and for a few months no further danger was to be apprehended from the east.
A day of thanksgiving was proclaimed by the King, and was celebrated with pride and delight by his people. The rejoicings in England were not less enthusiastic or less sincere. This may be selected as the point of time at which the military glory of Frederic reached the zenith. In the short space of three quarters of a year he had won three great battles over the armies of three mighty and warlike monarchies, France, Austria, and Russia.