In 1709 he was promoted to Lieutenant General. He fought at Malplaquet, and was wounded in the neck at the siege of Mons, but quickly recovered. At the end of 1709 Cadogan was appointed as a Lieutenant of the Tower of London. During the breaking of the lines of Ne Plus Ultra, he again commanded the allied advance guard, and established a bridgehead across the lines prior to Marlborough's arrival with the main army.