The Battle of Malplaquet, fought on September 11 1709, was one of the main battles of the War of the Spanish Succession, which opposed the Bourbons of France and _From_the_Renaissance_to_the_19th_century against an alliance whose major members were the Habsburg Empire, the United Kingdom of Great Britain and the United Provinces.
The allied army (the vast majority of the troops Dutch and Austrian) were led by Marlborough and Prince Eugene of Savoy, while the French were commanded by Villars and Marshal Boufflers, officially Villars' superior but voluntarily serving under him. The allied had about 86,000 troops and 100 guns and the French had about 75,000 and 80 guns , and were encamped within cannon range of each other near what is now the Belgian border. The Austrians attacked at 9am, pushing the French left wing back into the forest behind them. The Dutch, on the Allied left wing, attacked the French right flank half an hour later, and succeeded with heavy casualties to distract Boufflers enough so that he could not come to Villars' aid.
Villars was able to regroup his forces, but Marlborough and Eugène attacked again, assisted by the advance of a detachment under General Withers advancing on the French left flank, forcing Villars to divert forces from his centre to confront them. At around 1 pm Villars was badly wounded by a musket ball which smashed his knee, and command passed to Boufflers. The decisive final attack was made on the now weakened French centre by infantry under the command of the Earl of Orkney, which managed to occupy the French line of redans. This enabled the Allied cavalry to advance through this line and confront the French cavalry behind it. A fierce cavalry battle now ensued, in which Boufflers personally led the elite troops of the Maison du Roi. He managed no less than six times to drive the Allied cavalry back upon the redans, but every time the French cavalry in its turn was driven back by British infantry fire. Finally, by 3 pm Boufflers, realising that the battle could not be won, ordered a retreat, which was made in good order. The Allies had suffered so many casualties in their attack that they could not pursue him. By this time they had lost over 21,000 men, almost twice as many as the French.
By the norms of warfare of the era, the battle was an allied victory, as the French withdrew at the end of the day's fighting, and left Marlborough's army in possession of the battlefield. Unlike the Duke's previous victories, however, the French army was able to withdraw in good order and relatively intact, and remained a potent threat to further allied operations.