 Complete the following phrase:  On 10 June 1940, when Italy entered the Second World War, he became Chief of Staff first of Admiral Riccardo Paladini, and then of Admiral Angelo Iachino, commanders of the 2nd Fleet. He participated in the battle of Punta Stilo and then in operations that saw the Italian fleet opposing the movements of the Mediterranean Fleet from 31 August to 1 September 1940, without meeting the enemy in battle. At the end of November he participated in the battle of Cape Spartivento. In December 1940, when the First and Second Fleet were merged into a unified battlefleet, under the command of Admiral Iachino, Accorretti assumed the position of Chief of Staff of the newly established Naval Battle Forces F.N.B.. In this new position he collaborated with Iachino in the reorganization and transfer of personnel for the establishment of a unified command and participated in the main naval operations of 1941, such as the fruitless chase for the British squadron 