From 16 to 20 July, "Trieste", "Bolzano", "Ascari", "Corazziere", and the destroyer covered another fast convoy to Tripoli. On 22 August, "Trieste" sortied with other elements of the Italian fleet to try to locate Force H; they returned to port four days later empty handed. In late September, the British sent another convoy to reinforce Malta, codenamed Operation Halberd; the Italian fleet sortied on 26 September to try to intercept it, but broke off the operation upon discovering the strength of the British escort force. "Trieste" took part in the "Duisberg" convoy on 8–9 November along with "Trento", the two ships serving as the convoy's 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.