from the main body of the Austrian Army, much to the annoyance of the Russian liaison officer, Alexander Ivanovich, Count Ostermann-Tolstoy. On 14 August 1799, a Russian force of 6,000 cavalry, 20,000 infantry, and 1,600 Cossacks, under Alexander Korsakov, joined Archduke Charles' force in Schaffhausen. In a vice-like operation, together with the Russians, they would surround André Masséna's smaller army on the banks of the Limmat, where it had taken refuge the previous spring. To divert this attack, General Claude Lecourbe, attacked the pontoon bridges over which the Austrians crossed the Rhine, destroying most of them, and making the rest unusable. Before Charles could regroup, orders arrived from the Aulic Council, the imperial body in Vienna charged with conduct of war, to countermand his plan; Charles' troops were to leave Zurich in the supposedly capable hands of Korsokov, re-cross the Rhine and march north to Mainz. Charles stalled this operation as long as he could, but eventually he had to concede to Vienna's orders. Consequently, the Russian troops under a novice general replaced the Austrian troops and their seasoned commander. Charles withdrew his force to the north of the Rhine. Although the order to Charles to recross the Rhine and march north was eventually countermanded, by the time such instructions reached him, they were too late to reverse. In the Second Battle of Zürich, the French regained control of the city, along with the rest of Switzerland. Notably, Massena out-generaled Korsakov; surrounded him, tricked him, and then took more than half his army prisoner, plus captured the baggage train and most of his cannons, and inflicted over 8,000 casualties. Most of the fighting took place on both banks of the Limmat up to the gates of Zürich, and part within the city itself. Zürich had declared itself neutral, and was spared general destruction. General Nicolas Oudinot commanded the French forces on the right bank and General Édouard Mortier, those on the left. On the same day, Jean-de-Dieu Soult and about 10,000 troops faced Hotze and 8,000 Allies in the Battle of Linth River. Soult sent 150 volunteers to swim the river in the middle of the night. Most carried a saber in their teeth and a pistol and cartridges tied to their heads; others carried drums or bugles. These soldiers killed the Austrian sentries, overran an outpost, made much confusing noise, and signaled Soult's main force to cross in boats.