A quadruple is a term from mathematics, depicting an n-tuple with n being 4. This means it depicts four elements, with the order of the elements carrying meaning (unlike a set, where the order of the elements is meaningless and where no element could exist more than once). Derived from this abstract meaning it is used in several other contexts. History Main article: History of mathematics In addition to recognizing how to count concrete objects, prehistoric peoples also recognized how to count abstract quantities, like time -- days, seasons, years. ...
The Quadruple Alliance of 1718 was formed by Great Britain, France, the Holy Roman emperor, and the Netherlands when Philip V of Spain, guided by Cardinal Alberoni, sought by force to nullify the peace settlements reached after the War of the Spanish Succession (see Utrecht, Peace of).
A progressive rapprochement between Spain and France led to the Family Compact of 1733 and a further redistribution of territories after the War of the Polish Succession (1733–35).
The Quadruple Alliance of 1834 was formed by Great Britain, France, Spain, and Portugal for the purpose of strengthening the constitutional government of Spain and the throne of Isabella II against the Carlists.
The term "Quadruple Alliance" refers to several historical military alliances; none of which remain in effect.
1- The Quadruple Alliance of 1718 was an alliance between Austria, France, the Netherlands and Britain - aimed at revising (principally at Spain's expense) the treaties which ended the War of the Spanish Succession.
3- The Quadruple Alliance of 1834 was formed by Britain, 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.
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