180px|left|thumb|Elisabeth with her eldest son Charles. The birth of Charles encouraged Prime Minister Alberoni to start laying out grand plans for Europe. In 1717 he ordered the Spanish invasion of Sardinia. In 1718, Alberoni also ordered the invasion of Sicily, which was also ruled by the House of Savoy. In the same year Charles's first sister, Infanta Mariana Victoria was born on 31 March. In reaction to the Quadruple Alliance of 1718, the Duke of Savoy then joined the Alliance and went to war with Spain. This war led to the dismissal of Alberoni by Philip in 1719. The Treaty of The Hague of 1720 included the recognition of Charles as heir to the Italian Duchies of Parma and Piacenza.
180px|left|thumb|Elisabeth with her eldest son Charles. The birth of Charles encouraged Prime Minister Alberoni to start laying out grand plans for Europe. In 1717 he ordered the Spanish invasion of Sardinia. In 1718 Alberoni also ordered the invasion of Sicily, which was also ruled by the House of Savoy. In the same year Charles's first sister Infanta Mariana Victoria was born on 31 March. In reaction to the Quadruple Alliance of 1718, the Duke of Savoy then joined the Alliance and went to war with Spain. This war led to the dismissal of Alberoni by Philip in 1719. The Treaty of The Hague of 1720 included the recognition of Charles as heir to the Italian Duchies of Parma and Piacenza