 Complete the following phrase:  On 5 July 1940, British aircraft carrier launched an attack on Tobruk harbor. Its Fairey Swordfish torpedo bombers sank Zeffiro, and severely damaged Euro. Later that month, on 20 July, during another attack on Tobruk harbour, other Swordfish from HMS Eagle sank with torpedoes both Nembo and Ostro. On 17 September of the same year, Swordfish from attacked Benghazi harbor where Aquilone and Borea were berthed, and both were sunk. Euro was part of the escort of the ill-fated 