Invasion of Corsica (1553) 1 February 1553, a new Franco-Ottoman treaty of alliance, involving naval collaboration against the Habsburgs, had been signed between France and the Ottoman Empire. The Ottoman admirals Turgut and Koja Sinan, together with a French squadron under Baron Paulin de la Garde, raided the coasts of Naples, Sicily, Elba and then Corsica. The island of Corsica was occupied by the Genoese at the time. The Ottoman fleet supported the French by ferrying the French troops of Parma under Marshal Paul de Thermes from Siennese Maremma to Corsica. The French were also supported by Corsican exiles under Sampiero Corso and Giordano
Defensive Organization of Corsica and to support artillery batteries capable of controlling the Strait of Bonifacio between Corsica and the Italian island of Sardinia, separated by only twelve kilometers. As World War II unfolded, no attempt was made by Italian forces to mount an opposed landing on Corsica. The island was instead occupied in November 1942. In 1943 Corsica saw fighting when German forces moved from Sardinia. Most of the fortified positions remain to the present day. During the inter-war period, Corsica's defenses were first examined in 1926, when General Debeney requested a study of the island's defenses from Vice-Admiral Salaun, the French Navy