The Battle of Blenheim (German: Zweite Schlacht bei Höchstädt; French Bataille de Höchstädt), fought on 13 August 1704, was a major battle of the War of the Spanish Succession. The overwhelming Allied victory ensured the safety of Vienna from the Franco-Bavarian army, thus preventing the collapse of the Grand Alliance. Louis XIV of France sought to knock the "Holy Roman" Emperor, Leopold out of the war by seizing Vienna, the Habsburg capital, and gain a favourable peace settlement. The dangers to Vienna were considerable: the Elector of Bavaria and Marshal Marsin's forces in Bavaria threatened from the west, and Marshal Vendôme's large army in northern Italy posed a serious danger with a potential offensive through the Brenner Pass. Vienna was also under pressure from Rákóczi's Hungarian revolt from its eastern approaches. Realising the danger, the Duke of Marlborough resolved to alleviate the peril to Vienna by marching his forces south from Bedburg and help maintain Emperor Leopold within the Grand Alliance. A combination of deception and skilled administration - designed to conceal his true destination from friend and foe alike - enabled Marlborough to march 250 miles (400 kilometres) unhindered from the Low Countries to the River Danube in five weeks. After securing Donauwörth on the Danube, Marlborough sought to engage the Elector's and Marsin's army before Marshal Tallard could bring reinforcements through the Black Forest. However, with the Franco-Bavarian commanders reluctant to fight until their numbers were deemed sufficient, the Duke enacted a policy of plundering in Bavaria designed to force the issue. The tactic proved unsuccessful, but when Tallard arrived to bolster the Elector's army, and Prince Eugene arrived with reinforcements for the Allies, the two armies finally met on the banks of the Danube in and around the small village of Blindheim, from which the English "Blenheim" is derived. Blenheim was one of the battles that altered the course of the war, which until then was leaning for Louis' coalition, and ended French plans of knocking the Emperor out of the war. France suffered as many as 38,000 casualties including the commander-in-chief, Marshal Tallard, who was taken captive to England. Before the 1704 campaign ended, the Allies had taken Landau, and the towns of Trier and Trarbach on the Moselle in preparation for the following year's campaign into France itself. The offensive never materialised as the Grand Alliance's army had to depart the Moselle to defend Liège from a French counteroffensive. The war would rage on for another decade. By 1704, the War of the Spanish Succession was in its fourth year. The previous year had been one of success for France and her allies, most particularly on the Danube, where Marshal Villars and the Elector of Bavaria had created a direct threat to Vienna, the Habsburg capital. Vienna had been saved by dissension between the two commanders, leading to the brilliant Villars being replaced by the less dynamic Marshal Marsin. Nevertheless, by 1704, the threat was still real: Rákóczi's Hungarian revolt was already threatening the Empire's eastern approaches, and Marshal Vendôme's forces threatened an invasion from northern Italy. In the courts of Versailles and Madrid, Vienna's fall was confidently anticipated, an event which would almost certainly have led to the collapse of the Grand Alliance.