 Complete the following phrase:  Trento moved to La Spezia on 6 May for an extensive overhaul that lasted until 5 August, at which point she returned to Messina. She took part in the Duisberg convoy on 89 November along with Trieste, the two ships serving as the convoys covering force. The convoy was attacked by British warships in the early hours of 9 November, though the covering force failed to intervene and the convoy was destroyed. Another convoy followed on 21 November, and during the crossing Trento helped to defend against a British air attack. Less than a month later, on 16 December, Trento joined most of the other heavy units of the fleet to escort two large convoys to Benghazi and Tripoli. The following day, the fleet encountered British forces covering a merchant ship steaming to Malta, leading to the inconclusive First Battle of Sirte. On 22 March 1942, Trento joined the battleship , the cruisers and , and several destroyers in an attempt to intercept a British convoy. In the 