John Campbell, 3rd Duke of Argyll (1680-1743), was a prominent Scottish nobleman and politician. He was a member of the Campbell family, one of the most influential clans in Scotland. The Duke played a significant role in the British Parliament and was known for his support of the Hanoverian succession during the Jacobite uprisings. As a military leader, the Duke served in various campaigns, including the War of the Austrian Succession. He was also involved in the administration of Scotland and held the title of Lord Justice General. His contributions to both military and political spheres helped shape the future of Scotland and Britain.