Quadruple Alliance may refer to:
- In the Franco-Dutch War, 1673 alliance of the Netherlands, the Holy Roman Empire, Spain, and Lorraine
- In the War of the Quadruple Alliance, 1718 alliance of Austria, France, the Dutch Republic, and Great Britain
- Quadruple Alliance (1815) after the Napoleonic Wars, of the United Kingdom, Austria, Prussia, and Russia
- Enforcers of the Concession of Evoramonte in 1834 in Portugal, namely the United Kingdom, France, Spain, and Portugal
- Central Powers in World War I in 1914–18, namely Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria
Famous quotes containing the word alliance:
“From his childhood onwards this boy will be surrounded by sycophants and flatterers.... In due course, following the precedent which has already been set, he will be sent on a tour of the world and probably rumours of a morganatic marriage alliance will follow, and the end of it will be the country will be called upon to pay the bill.”
—James Keir Hardie (1856–1915)