The unit should be in the production queue - not yet deployed on the map in 1939.
Between 1937 and 1940, Andrea Doria underwent a refit just like her sister Duilio, changing her armament to two triple and two twin OTO 320 mm Model 1934 guns, four triple 135 mm/45 OTO 1937 cannons, ten 90 mm/53 Ansaldo anti-aircraft guns, six twin and three single 37 mm/54 Breda autocannons, and eight twin 20 mm Breda Model 35 autocannons, together with her torpedo tubes being removed.
Andrea Doria was extensively rebuilt in 1937–1940 at Trieste. Her forecastle deck was extended further aft, until it reached the mainmast. The stern and bow were rebuilt, increasing the length of the ship to 186.9 m (613 ft), and the displacement grew to 28,882 t (28,426 long tons). Her old machinery was replaced with more efficient equipment and her twenty boilers were replaced with eight oil-fired models; the new power plant was rated at 75,000 shp (56,000 kW) and speed increased to 26 kn (48 km/h; 30 mph). The ship's amidships turret was removed and the remaining guns were bored out to 320 mm (12.6 in). Her secondary battery was completely overhauled; the 152 mm guns were replaced with twelve 135 mm (5.3 in) guns in triple turrets amidships. The anti-aircraft battery was significantly improved, to include ten 90 mm (3.5 in) guns, fifteen 37 mm (1.5 in) 54-cal. guns, and sixteen 20 mm (0.79 in) guns. Later, during World War II, four more 37 mm guns were installed and two of the 20 mm guns were removed. After emerging from the modernization, Andrea Doria's crew numbered 35 officers and 1,450 enlisted men.
Andrea Doria was still out of service in 1939 when the Second World War broke out in Europe. Work was finished by October 1940, and on the 26th of the month, she rejoined the Italian fleet in the 5th Division in Taranto.
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