The Hanoverians being now quite subdued, and the whole force of the French let loose against the king of Prussia by this treaty, mareschal Richelieu immediately ordered lieutenant-general Berchini to march with all possible expedition, with the troops under his command, to join the prince de Soubise: the gens-d’-arms, and other troops that were in the landgraviate of Hesse-Cassel, received the same order; and sixty battalions of foot, and the greatest part of the horse belonging to the French army, were directed to attack the Prussian territories. Mareschal Richelieu himself arrived at Brunswick on the fifteenth of September; and having, in a few days after, assembled an hundred and ten battalions, and an hundred and fifty squadrons, with an hundred pieces of cannon, near Wolfenbuttel, he entered the king of Prussia’s dominions with his army on the twenty-seventh, twenty-eighth, and twenty-ninth of the same month, in three columns, which penetrated into Halberstadt and Brandenburgh, plundering the towns, exacting contributions, and committing many enormities, at which their general is said to have connived. In the meantime the duke of Cumberland returned to England, where he arrived on the eleventh of October, and shortly after resigned all his military commands.
Had the allied army, after the battle of Hastenbeck, marched directly to the Leine, as it might easily have done, and then taken post on the other side of Wolfenbuttel, Halberstadt, and Magdeburgh, it might have waited securely under the cannon of the latter place for the junction of the Prussian forces; instead of which, they injudiciously turned off to the Lower Weser, retiring successively from Hamelen to Nienburgh, Verden, Rothenburgh, Buxtehude, and lastly to Stade, where, for want of subsistence and elbow-room, the troops were all made prisoners of war at large. They made a march of an hundred and fifty miles to be cooped up in a nook, instead of taking the other route, which was only about an hundred miles, and would have led them to a place of safety. By this unaccountable conduct, the king of Prussia was not only deprived of the assistance of near forty thousand good troops, which, in the close of the campaign, might have put him upon an equality with the French and the army of the empire; but also exposed to, and actually invaded by, his numerous enemies on all sides, insomuch that his situation became now more dangerous than ever; and the fate which seemed to have threatened the empress a few months before, through his means, was, to all appearance, turned against himself. His ruin was predicted, nor could human prudence foresee how he might be extricated from his complicated distress; for, besides the invasion of his territories by the French under the duke de Richelieu, the Russians, who had made for a long time a dilatory march, and seemed uncertain of their own resolutions, all at once quickened their motions, and entered Ducal Prussia, under mareschal Apraxin and general Fermor, marking their progress by every inhumanity that unbridled cruelty, lust, and rapine, can be imagined capable of committing. A large body of Austrians entered Silesia, and penetrated as far as Breslau; then, turning back, they laid seige to the important fortress of Schweidnitz, the key of that country. A second body entered Lusa-tia, another quarter of the Prussian territories, and made themselves masters of Zittau. Twenty-two thousand Swedes penetrated into Prussian Pomerania, took the towns of Anclam and Demmin, and laid the whole country under contribution. The army of the empire, reinforced by that of prince Soubise, after many delays, was at last in full march to enter Saxony; and this motion left the Austrians at liberty to turn the greatest part of their forces to the reduction of Silesia. An Austrian general penetrating through Lusatia, passed by the Prussian armies, and suddenly presenting himself before the gates of Berlin, laid the whole country under contribution; and though he retired on the approach of a body of Prussians, yet he still found means to interrupt the communication of these last with Silesia. The Prussians, it is true, exerted themselves bravely on all sides, and their enemies fled before them; but whilst one body was pursuing, another gained upon them in some other part. The winter approached, their strength decayed, and their adversaries multiplied daily. Their king harassed, and almost spent with incessant fatigue both of body and of mind, was in a manner excluded from the empire. The greatest part of his dominions were either taken from him, or laid under contribution, and possessed by his enemies, who collected the public revenues, fattened on the contributions, and with the riches which they drew from the electorate of Hanover, and other conquests, defrayed the expenses of the war; and by the convention of Closter-Seven he was deprived of his allies, and left without any assistance whatever, excepting what the British parliament might think fit to supply. How different is this picture from that which the king of Prussia exhibited when he took arms to enter Saxony! But, in order to form a clear idea of these events, of the situation of his Prussian majesty, and of the steps he took to defeat the designs of his antagonists, and extricate himself from his great and numerous distresses, it will be proper now to take a view of the several transactions of his enemies, as well during his stay in Bohemia, as from the time of his leaving it, down to that which we are now speaking of.