Quadruple Alliance (1718))

A treaty signed by Britain, France, and the Habsburg emperor, to which the Dutch were expected to accede, to ensure the principle of collective security in W Europe. It provided for mutual guarantees of titles, possessions, and rights of succession, despite Spain's hostility to Italian territorial provisions, and secured peace for a generation (1718–33).

The term "Quadruple Alliance" refers to several historical military alliances;

1- The Quadruple Alliance of 1674 was an alliance between the Holy Roman Empire, the Kingdom of Spain, the Electorate of Brandenburg, and the United Provinces of the Netherlands, in the context of the Franco-Dutch War.

2- The Quadruple Alliance of 1718 was an alliance between Austria, France, the Netherlands and Great Britain - aimed at revising (principally at Spain's expense) the treaties which ended the War of the Spanish Succession.

3- The Quadruple Alliance of 1745 was formed between the United Kingdom, the Netherlands, Saxony and Austria in the later stages of the War of the Austrian Succession.

5- The Quadruple Alliance of 1835 was formed by the United Kingdom, France, Spain and Portugal to support queen Isabella II of Spain against her uncle Don Carlos, Count of Molina, who claimed the Spanish throne under the succession law of 1714-1830.