 Complete the following phrase:  On 21 January 1943, Cunningham was promoted to Admiral of the Fleet. February 1943 saw him return to his post as Commander-in-Chief, Mediterranean Fleet. Three months later, when Axis forces in North Africa were on the verge of surrender, he ordered that none should be allowed to escape. Entirely in keeping with his fiery character he signalled the fleet Sink, burn and destroy: Let nothing pass. He oversaw the naval forces used in the joint Anglo-American amphibious invasions of Sicily, during Operation Husky, Operation Baytown and 