Marlborough had thus at length succeeded in drawing up the whole left wing of his army beyond the Nebel, and was about to press forward with it, when he was called away to another part of the field by a disaster that had befallen his centre. The Prince of Holstein Beck had, with eleven Hanoverian battalions, passed the Nebel opposite to Oberglau, when he was charged and utterly routed by the Irish brigade which held that village. The Irish drove the Hanoverians back with heavy slaughter, broke completely through the line of the allies, and nearly achieved a success as brilliant as that which the same brigade afterward gained at Fontenoy. But at Blenheim their ardor in pursuit led them too far. Marlborough came up in person, and dashed in upon the exposed flank of the brigade with some squadrons of British cavalry. The Irish reeled back, and as they strove to regain the height of Oberglau their column was raked through and through by the fire of three battalions of the allies, which Marlborough had summoned up from the reserve. Marlborough having reestablished the order and communications of the allies in this quarter, now, as he returned to his own left wing, sent to learn how his colleague fared against Marsin and the Elector, and to inform Eugene of his own success. Eugene had hitherto not been equally fortunate. He had made three attacks on the enemy opposed to him, and had been thrice driven back. It was only by his own desperate personal exertions, and the remarkable steadiness of the regiments of Prussian infantry, which were under him, that he was able to save his wing from being totally defeated. But it was on the southern part of the battle-field, on the ground which Marlborough had won beyond the Nebel with such difficulty, that the crisis of the battle was to be decided. Like Hannibal, Marlborough relied principally on his cavalry for achieving his decisive successes, and it was by his cavalry that Blenheim, the greatest of his victories, was won. The battle had lasted till five in the afternoon. Marlborough had now eight thousand horsemen drawn up in two lines, and in the most perfect order for a general attack on the enemy's line along the space between Blenheim and Oberglau. The infantry was drawn up in battalions in their rear, so as to support them if repulsed, and to keep in check the large masses of the French that still occupied the village of Blenheim. Tallard now interlaced his squadrons of cavalry with battalions of infantry, and Marlborough, by a corresponding movement, brought several regiments of infantry and some pieces of artillery to his front line at intervals between the bodies of horse.