From these diplomatic amenities the general was forced to turn to the hazards of war. Gauging Bonaparte's missive at its true worth, the Emperor determined to re-conquer Italy, an enterprise that seemed well within his powers. In the month of October victory had crowned the efforts of his troops in Germany. At Würzburg the Archduke Charles had completely beaten Jourdan, and had thrown both his army and that of Moreau back on the Rhine. Animated by reviving hopes, the Imperialists now assembled some 60,000 strong. Alvintzy, a veteran of sixty years, renowned for his bravery, but possessing little strategic ability, was in command of some 35,000 men in the district of Friuli, north of Trieste, covering that seaport from a threatened French attack. With this large force he was to advance due west, towards the River Brenta, while Davidovich, marching through Tyrol by the valley of the Adige, was to meet him with the remainder near Verona. As Jomini has observed, the Austrians gave themselves infinite trouble and encountered grave risks in order to compass a junction of forces which they might quietly have effected at the outset. Despite all Bonaparte's lessons, the Aulic Council still clung to its old plan of enveloping the foe and seeking to bewilder them by attacks delivered from different sides. Possibly also they were emboldened by the comparative smallness of Bonaparte's numbers to repeat this hazardous manoeuvre. The French could muster little more than 40,000 men; and of these at least 8,000 were needed opposite Mantua. At first the Imperialists gained important successes; for though the French held their own on the Brenta, yet their forces in the Tyrol were driven down the valley of the Adige with losses so considerable that Bonaparte was constrained to order a general retreat on Verona. He discerned that from this central position he could hold in check Alvintzy's troops marching westwards from Vicenza and prevent their junction with the Imperialists under Davidovich, who were striving to thrust Vaubois' division from the plateau of Rivoli.