 Complete the following phrase:  Probably as a result of his vocal skepticism concerning the claimed sinking of two American battleships by submarine commander Enzo Grossi, on 29 December 1942 Polacchini was called back to Italy, with Grossi replacing him as the commander of BETASOM. In January 1943 Polacchini was given command of the Palermo Naval Command; he participated in the organization of supply convoys to North Africa during the 