On that same day, the fleet had been scheduled to sail towards Salerno in order to attack the Allied ships sailing to invade Italy as part of Operation Avalanche; the proclamation of the armistice on 8 September, however, had led to the cancellation of this operation. As German forces in Italy launched Operation Achse, Admiral Bergamini was ordered to leave La Spezia, in order to prevent the fleet from falling in German hands, and reach Allied-controlled ports. Due to Bergamini's initial reluctance to bring his ships to Malta (not knowing the details of the armistice and what would be the fate of the fleet once in Allied controlled ports) and to initial plans for the transfer of Victor Emmanuel III, his court and the government from Rome to La Maddalena (the destroyers "Vivaldi" and "Da Noli" sailed from Genoa and La Spezia, heading for Civitavecchia, for this purpose), the initial destination was La Maddalena, a naval base in Sardinia. Once at La Maddalena, Bergamini would receive further orders (to proceed to Malta) from Admiral Bruno Brivonesi, naval commander of Sardinia, as well as some documents regarding the conditions of the armistice for the Navy. The transfer of the king to La Maddalena was cancelled, however (he instead fled towards Pescara), and when the fleet arrived off La Maddalena, German troops had occupied that base to transfer their troops from Sardinia to Corsica, therefore the stop at La Maddalena was also cancelled and Supermarina ordered Bergamini to head for Allied-controlled Bône. The fleet then changed course, but when Germany learned that the Italian fleet was sailing towards an Allied base, the "Luftwaffe" sent Dornier Do 217s armed with Fritz X radio-controlled bombs to attack the ships. These aircraft caught up with the force when it was in the Strait of Bonifacio.