In 1745, the regiment took part in the Battle of Fontenoy in the Austrian Netherlands between a British and Allies force and the French. The British and Allied force were under the command of the Duke of Cumberland while the French force was commanded by Maurice de Saxe. The British and their Allies, despite performing valiantly, lost the battle to the French with both sides losing many men. The battle was quite fierce, and the 3rd Foot Guards suffered quite badly, losing over 100 officers and men during the engagement. The regiment subsequently had a brief period back in Great Britain during the Second Jacobite Rebellion which was led by Bonnie Prince Charlie who claimed the throne of Great Britain, aided by France. The regiment was soon back in the Low Countries though, and in 1747 took part in the Battle of Lauffeld which ended in a defeat for Britain and her Allies who had been outnumbered by the French. The long War of the Austrian Succession would finally end the following year.