 Complete the following phrase:  When Elisabeth Farnese became Philips second wife in 1714, he already had two sons who were next in line for the Spanish throne. She wanted to create an Italian inheritance for her own children, while Philip viewed regaining these territories as important for his prestige. Spain re-occupied Sardinia unopposed in 1717 but a landing on Sicily in 1718 led to the War of the Quadruple Alliance. The Royal Navys victory at 