The War of the Quadruple Alliance (1718–1720) was a result of the ambitions of King Philip V of Spain, his wife, Elisabeth Farnese, and his chief minister Giulio Alberoni to retake territories in Italy and to claim the French throne. It saw the defeat of Spain by an alliance of Britain, France, Austria (then a state of the Holy Roman Empire), and the Dutch Republic. Savoy later joined the coalition as the fifth ally. Although fighting began as early as 1717, war was not formally declared until December 1718. It was brought to an end by the Treaty of The Hague in 1720.