Toward the conclusion of the campaign an army under Broglio again pushed forward and succeeded in defeating the Prince von Ysenburg, who was to have covered Hesse with seven thousand men at Sangerhausen; another body of troops under Soubise also beat Count Oberg, on the Lutterberg. The troops on both sides then withdrew into winter quarters. The French had, during this campaign, also penetrated as far as East Friesland, whence they were driven by the peasantry until Wurmser of Alsace made terms with them and maintained the severest discipline among his troops. The campaign of 1759 was opened with great caution by the allies. The French reënforced the army opposed to the Duke of Brunswick, and attacked him on two sides, Broglio from the Main, Contades from the Lower Rhine. The Duke was pushed back upon Bergen, but nevertheless gained a glorious victory over the united French leaders at Minden. His nephew, the Crown Prince Ferdinand, also defeated another French army under Brissac, on the same day, at Herford. The Imperial army, commanded by its newly nominated leader, Charles of Wurtemberg, advanced, but was attacked by the Crown Prince, while its commander was amusing himself at a ball at Fulda, and ignominiously put to flight. Frederick, although secure against danger from this quarter, was threatened with still greater peril by the attempted junction of the Russians and Austrians, who had at length discovered that the advantages gained by Frederick had been mainly owing to the want of unity in his opponents. The Russians under Soltikoff, accordingly, approached the Oder. Frederick, at that time fully occupied with keeping the main body of the Austrians under Daun at bay in Bohemia, had been unable to hinder Laudon from advancing with twenty thousand men for the purpose of forming a junction with the Russians. In this extremity he commissioned the youthful general, Wedel, to use every exertion to prevent the further advance of the Russians. Wedel was, however, overwhelmed by the Russians near the village of Kay, and the junction with Laudon took place.