Brigadier-General George Haldane fought in the Battle of Fontenoy in 1743, where he was wounded. He fought in the Battle of Dettingen in 1743 and he also fought in the 1745 Uprising against the Jacobites. He gained the rank of brigadier general in the service of the 3rd Guards, and fought in the Battle of Leffelt in 1747. His final service was in the Battle of Roucoux in 1747.