The öchstäBattle of Höchstädt was fought on 19 June 1800 on the north bank of the Danube near Höchstädt, and resulted in a French victory under General Jean Victor Marie Moreau against the Austrians under Baron Pál Kray. The Austrians were subsequently forced back into the fortress town of Ulm. Instead of attacking the heavily fortified, walled city, which would result in massive losses of personnel and time, Moreau dislodged Kray's supporting forces defending the Danube passage further east. As a line of retreat eastward disappeared, Kray quickly abandoned Ulm, and withdrew into Bavaria. This opened the Danube pathway toward Vienna.
The Danube passage connecting Ulm, Donauwörth, Ingolstadt and Regensburg had strategic importance in the ongoing competition for European hegemony between France and the Holy Roman Empire; the army that commanded the Danube, especially its passage through Württemberg and Bavaria, could command access to the important cities of Munich and the seat of Habsburg authority: Vienna. The result of the battle was the opposite of what had occurred on those same fields in 1704 during the War of the Spanish Succession, when the Second Battle of Höchstädt had ensured the safety of Vienna and opened the pathway into France for the allied English and Austrian forces.
Background
Although the First Coalition forces achieved several initial victories at Verdun, Kaiserslautern, Neerwinden, Mainz, Amberg and Würzburg, the efforts of Napoleon Bonaparte in northern Italy pushed Austrian forces back and resulted in the negotiation of the Peace of Leoben (17 April 1797) and the subsequent Treaty of Campo Formio (October 1797). This treaty proved difficult to administer. Austria was slow to give up some of the Venetian territories. A Congress convened at Rastatt for the purposes of deciding which southwestern German states would be mediatised to compensate the dynastic houses for territorial losses, but was unable to make any progress. Supported by French republican forces, Swiss insurgents staged several uprisings, ultimately causing the overthrow of the Swiss Confederation after 18 months of civil war. By early 1799, the French Directory had become impatient with stalling tactics employed by Austria. An uprising in Naples raised further alarms, and recent gains in Switzerland suggested the timing was fortuitous for the French to venture on another campaign in northern Italy and southwestern Germany.
At the beginning of 1800, the armies of France and Austria faced each other across the Rhine. Feldzeugmeister Pál Kray led approximately 120,000 troops. In addition to his Austrian regulars, his force included 12,000 men from the Electorate of Bavaria, 6,000 troops from the Duchy of Württemberg, 5,000 soldiers of low quality from the Archbishopric of Mainz, and 7,000 militiamen from the County of Tyrol. Of these, 25,000 men were deployed east of Lake Constance (Bodensee) to protect the Vorarlberg. Kray posted his main body of 95,000 soldiers in the L-shaped angle where the Rhine changes direction from a westward flow along the northern border of Switzerland to a northward flow along the eastern border of France. Unwisely, Kray set up his main magazine at Stockach, near the northwestern end of Lake Constance, only a day's march from French-held Switzerland.