Once the treaty with the Turks was secured, Francis I invaded Savoy in 1536, starting the Italian War of 1536–1538. A Franco-Turkish fleet was stationed in Marseille by the end of 1536, threatening Genoa. In 1537 Hayreddin Barbarossa raided the Italian coast and laid siege to Corfu, although this provided only limited assistance to the French. With Charles V unsuccessful in battle and squeezed between the French invaders and the Ottomans, Francis I and Charles V ultimately made peace at the Truce of Nice, 18 June 1538. La Forêt died at Constantinople in the following year. Charles V would turn his efforts against the Ottomans, only to lose the Battle of Preveza on 28 September 1538.