In September 1937 the Nyon Conference was called by France and Great Britain to address the " underwater piracy " conducted against merchant traffic in the Mediterranean . On September 14 , an agreement was signed establishing British and French patrol zones around Spain ( with a total of 60 destroyers and airforce employed ) to counteract aggressive behavior by submarines . Italy was not directly accused , but had to comply with the agreement and suspend the maritime operations
Nyon Conference
Nyon Conference
Italian destroyer Turbine (1927)