Many participants of the Washington and London Naval Treaties tried to find loopholes in the texts of the treaties. Determining the size and armament of ship types, the treaties stated that ships with a displacement of less than 600 tons could be built in unlimited numbers. In the 1930s, Italy built 32 Spica-class destroyers, which approached full-fledged destroyers in terms of their armament and speed. In 1939, Sweden purchased from Italy the two earliest ships of this class, Spica and Astore, which were renamed Romulus and Remus.