When Italy entered the war on 10 June 1940, Carlo Fecia di Cossato had the command of the submarine “Menotti” of the 34° Squadriglia of Messina
One aspect of the Italian submarine that was commendable was their advanced Torpedo design. Prof. Carlos Calosi was the inventor of the magnetically activated torpedo, which could sink a ship merely by passing underneath its hull. That may be one of the reasons why Italian submarines had such a good attack/kill ratio.
Considered the first real “armored clash” is spawned at Mechili (* see notes below). The Italian Special Armored Brigade destroys 15 British tanks and pursue the the British for an additional 20 kilometers before losing communication with the home base and turning back. They then destroy another 6 tanks from a British counterattack.