Quadruple Alliance

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