From 8 to 15 September, the Germans conducted demolitions on seven Sardinian airfields but Italian aircraft had begun landing on other airfields on 10 September, some en route to Sicily and Tunisia to join the Allies, others to operate from Sardinia with the Allies. Five Cant Z 1007 bombers attacked German ships in the Bay of Bonifacio on 16 September and aircraft retaliated with attacks on Sardinian airfields for the next four days. By 19 September, the 90th Panzergrenadier Division, a fortress brigade, anti-aircraft and units comprising 25,800 men, 4,650 vehicles and of supplies had reached Corsica from Sardinia. In Sardinia the XII Paratroopers Battalion of the 184th Paratroopers Division "Nembo" defected to the Germans.
