While the battle stood as described on the right and centre of the Irish line, the regiments of St. John, Tiffin, Lord George Hamilton, some French "and other regiments," were directed against its left. This division was led by the Prince of Hesse, and he had orders from General Mackey, who commanded in that quarter, not to pass the first line of hedges, but after establishing a position there to hold it until supported by the cavalry, which, under the command of Talmash, and supported by some regiments of infantry, were moving round towards the extreme left of the Irish, and forming on the plateau in front of Aughrim, with the intention of assaulting the pass leading up to it. The strength of this position, the narrow way which led to it, and the guns bearing across it from the hill, were such as to render the movement slow and hazardous; and the attack of the Prince of Hesse which depended on its result should necessarily be so regulated as to keep time with it. Talmash drew up his command on the common, and after directing his batteries, of which there were two, against the opposing force of the Irish, opened a fierce cannonade, while he formed his troops, both horse and foot, for the assault. In the mean time the Prince of Hesse had crossed the marsh, and approached the enemy's left on Kilcommodon. Meeting with no opposition, and scarcely apprehending any, so closely did the Irish there lie in their trenches, he advanced rapidly to possess the seemingly abandoned trenches, until within a few yards of them, when their sudden appearance, and a succession of well-directed volleys, warned him of his error. This unexpected salute checked the onward movement of his troops, and for a time they wavered as if about to retreat. But the ardor of the impetuous Prince being excited, he rallied them again, and under his order to charge, they rushed forward with increased fury and entered the lines of the enemy. This afforded the latter the opportunity sought, and no sooner had the assailants advanced to a proper distance, than they were taken front and flank, turned, as at the centre, and driven back on their supports, now being pushed eagerly forward by General Mackey, who, after several attempts to check their retreat, dispatched orders to Talmash to suspend his assault on the Pass of Aughrim, and lead back the infantry to the support of his broken division. Under this order fresh succors were deployed from the English right, but Talmash himself, unwilling to abandon his design, remained with his cavalry and a portion of the infantry, to carry out his projected attack.