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Events on Sunday 22 August 1717 1
1717Spain invades SardiniaCardinal Alberoni's offensive opens the War of the Quadruple AllianceA Spanish fleet and army seized the Mediterranean island of Sardinia from Austria beginning in August 1717. The attack, orchestrated by chief minister Cardinal Giulio Alberoni, violated the Treaty of Utrecht and provoked the formation of the Quadruple Alliance against Spain. Fighting continued into 1718 with a further Spanish invasion of Sicily.