The Battle of Schellenberg, also known as the Battle of Donauwörth, was fought on 2 July 1704 during the War of the Spanish Succession. The engagement was part of the Duke of Marlborough's campaign to save the Habsburg capital of Vienna from a threatened advance by King Louis XIV's Franco-Bavarian forces ranged in southern Germany. Marlborough had commenced his march from Bedburg, near Cologne, on 19 May; within five weeks he had linked his forces with those of the Margrave of Baden, before continuing on to the river Danube. Once in southern Germany, the Allies' task was to induce Max Emanuel, the Elector of Bavaria, to abandon his allegiance to Louis XIV and rejoin the Grand Alliance; but to force the issue, the Allies first needed to secure a fortified bridgehead and magazine on the Danube, through which their supplies could cross to the south of the river into the heart of the Elector's lands. For this purpose, Marlborough selected the town of Donauwörth. Once the Elector and his co-commander, Marshal Marsin, knew of the Allies' objective, they dispatched Count d'Arco with an advance force of 12,000 men from their main camp at Dillingen to strengthen and hold the Schellenberg heights above the town. Rejecting a protracted siege, Marlborough decided in favour of a quick assault, before the position could be made impregnable. After two failed attempts to storm the barricades, the Allied commanders, acting in unison, finally managed to overwhelm the defenders. It had taken just two hours to secure the bridgehead over the river in a hard-fought contest, but following the victory, momentum was lost to indecision. The deliberate devastation of the Elector's lands in Bavaria failed to bring Max Emanuel to battle or persuade him back into the Imperial fold. Only when Marshal Tallard arrived with reinforcements to strengthen the Elector's forces, and Prince Eugene of Savoy arrived from the Rhine to bolster the Allies, was the stage finally set for the decisive action at the Battle of Blenheim the following month. Background The Battle of Schellenberg was part of the Grand Alliance's campaign of 1704 to prevent the Franco-Bavarian army from threatening Vienna, the capital of Habsburg Austria. The campaign began in earnest on 19 May when the Duke of Marlborough began his 250-mile (400 km) march from Bedburg near Cologne towards the Elector of Bavaria's and Marshal Marsin's Franco-Bavarian army on the Danube. Marlborough had