Quadruple Alliance

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Quadruple Alliance, any of several European alliances. 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). An English fleet landed Austrian troops in Sicily, which Spain had seized, while French and English forces entered Spain. Early in 1720, Spain yielded to the allies, but the peace terms thoroughly revised those signed at Utrecht. The Treaty of The Hague restored Naples to the house of Austria; Austria in turn promised that Philip's son Charles (later Charles III of Spain) would succeed to Parma, Piacenza, and Tuscany. Savoy, in exchange for yielding Sicily to the house of Austria, received the island of Sardinia and became the kingdom of Sardinia. Spain joined the alliance. 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 Mar., 1814, was concluded among Great Britain, Austria, Prussia, and Russia at Chaumont, France, in order to strengthen their coalition against Napoleon I. After Napoleon's first abdication the four powers made peace with France (see Paris, Treaty of, 1814); after Napoleon's return from Elba, they defeated him in the Waterloo campaign and imposed on France the more severe Treaty of Paris of 1815. On the same day that treaty was signed (Nov. 20), the Quadruple Alliance was renewed in order to insure the treaty's execution. The so-called Holy Alliance, signed a few days earlier by Russia, Austria, and Prussia, became confused with the Quadruple Alliance, especially since the international congresses at Aachen (1818), Troppau (1820), Laibach (1821), and Verona (1822)—which were held according to provisions of the Quadruple Alliance—increasingly shaped the policy of the Holy Alliance, while England retired into "splendid isolation." In 1818, France joined the powers of the Quadruple Alliance to form a Quintuple Alliance. 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 Spanish marriages (1846; see Isabella II) ended Franco-British cooperation in Spanish affairs.

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Quadruple Alliance.
1. 1718. After the War of the Spanish Succession, Philip V of Spain was anxious to regain territory. France, Britain, and the Dutch formed a defensive Triple Alliance in 1717, which the Emperor Charles VI joined in 1718. The other allies agreed to support the Hanoverian succession in Britain. The emperor was to be given Sicily, and Sardinia was to go to Savoy. A British naval squadron defeated the Spanish fleet off Cape Passaro immediately after the treaty had been signed in 1718, and a French invasion of Spain in 1719 forced Philip to come to terms.

2. 1815. At the end of the Revolutionary and Napoleonic wars in 1815, the victorious powers—Britain, Russia, Prussia, and Austria—formed a Quadruple Alliance to maintain the peace and to hold periodic conferences to consider matters of common interest—the so-called Congress system. Meetings were held at Aix-la-Chapelle (1818), Troppau (1820–1), and Verona (1822), but differences between the allies were soon apparent. See Holy Alliance.

3. 1834. In the 1830s, the young queens of Portugal and of Spain were challenged by their uncles. Britain and France formed a Quadruple Alliance with Spain and Portugal in 1834 to protect them, as constitutional rulers, against intervention by Metternich. ‘All my own doing’ was Palmerston's claim, and he saw the alliance as a counter-balance to the despotic powers of Eastern Europe. But the alliance was short-lived and the liberalism of the queens suspect.

J. A. Cannon

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Quadruple Alliance Coalition between four states, in particular three alliances in Europe in the 18th and 19th centuries. The first was formed (1718) by Britain, France, the Holy Roman Empire, and the Netherlands against Philip V of Spain, after he seized Sicily and Sardinia. The second was formed (1814) by Austria, Britain, Prussia, and Russia against Napoleon I of France. After Napoleon's defeat the four partners created the Congress system. The third Quadruple Alliance (1834) consisted of Britain and France in support of Portugal and Spain, where liberal monarchies were threatened by reactionary claimants.