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The War of the Quadruple Alliance (1718-1720) was caused by Spanish attempts to recover territorial losses agreed by the 1713 Peace of Utrecht. Primarily conducted in Italy, it included minor engagements in the Americas and Northern Europe, as well as the Spanish-backed 1719 Jacobite Rising.
Spain recaptured Sardinia in 1717 without opposition, followed by a landing on Sicily in July 1718. This led to the Quadruple Alliance on 2 August 1718, comprising Britain, France, Emperor Charles VI and the Dutch Republic.
The war ended with the 1720 Treaty of The Hague; this restored the position prior to 1717 but with Savoy and Austria exchanging Sardinia and Sicily.
From : Wikipedia