In the War of the Quadruple Alliance, 1718 alliance of Austria, France, the Dutch Republic, and Great Britain
Finally, on 21 July 1718, the Treaty of Passarowitz ended the war with the Ottoman Empire and on 2 August, this led to the formation of the Quadruple Alliance, with the Emperor now joining the Triple Alliance.
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It was also in 1719 that the Irish exile, the Duke of Ormonde, organized an expedition with extensive Spanish support to invade Britain and replace King George I with James Stuart, the Jacobite "Old Pretender".
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The Battle of Cape Passaro (or Passero) was the defeat of a Spanish fleet under Admirals Antonio de Gaztañeta and Fernando Chacón by a British fleet under Admiral George Byng, near Cape Passero, Sicily, on 11 August 1718, four months before the War of the Quadruple Alliance was formally declared.
Capture of Vigo, a British operation to capture the city in 1719 as part of the War of the Quadruple Alliance