[4] They carried 274 tonnes (270 long tons) of fuel oil which gave them a range of 3,200 nautical miles (5,900 km; 3,700 mi) at a speed of 14 knots (26 km/h; 16 mph).

[8] On 28 June 1940, Espero, Ostro and Zeffiro were in convoy, heavily loaded down with cargo, when they were intercepted by a British task force of five ships.

In the ensuing battle, HMAS Sydney sank Espero as it lagged behind to allow the other two destroyers to reach Benghasi and later Tobruk safely.

On 17 September of the same year, Swordfish from HMS Illustrious attacked Benghazi harbor where Aquilone and Borea were berthed, and both were sunk.

[10] Euro was part of the escort of the ill-fated Duisburg convoy, when her commander lost the opportunity of torpedoing the cruiser HMS Aurora due to an error of identification.

On 3 July 1942, while escorting three freighters from Taranto to Benghazi along with the Navigatori-class destroyer Da Verrazzano, Euro and Turbine shot down two Beaufort bombers.

[11] After Italy signed the Armistice of Cassibile in September 1943, Euro participated in the Battle of Leros where she was sunk by German Junkers Ju 87 "Stuka" dive bombers during an air raid on 3 October 1943.