"Andrea Doria" and "Duilio" both cruised in the eastern Mediterranean after the war, and both were involved in postwar disputes over control of various cities. "Duilio" was sent to provide a show of force during a dispute over control of İzmir in April 1919 and "Andrea Doria" assisted in the suppression of Gabriele D'Annunzio's seizure of Fiume in November 1920. "Duilio" cruised the Black Sea after the İzmir affair until she was replaced in 1920 by the battleship "Giulio Cesare". "Andrea Doria" and "Duilio" were present during the Corfu incident in 1923. In January 1925, "Andrea Doria" visited Lisbon, Portugal, to represent Italy during the celebration marking the 400th anniversary of the death of explorer Vasco da Gama. The two ships performed the normal routine of peacetime cruises and goodwill visits throughout the 1920s and early 1930s; both were placed in reserve in 1933.