Answer:
I may be wrong but "In late October 1940, Mussolini invaded Greece without warning Hitler, Mussolini retaliating for Hitler not having warned him of his invasions that year, including into France. Britain was allied with Greece and sent a naval force from the Middle East to Greece. The British navy attacked the Italian fleet as it lay at anchor at Taranto in southern Italy. Italy's offensive against Greece broke down, and by late November the Greeks had pushed Mussolini's army back to Albania. Then, on December 9, the British launched an offensive against Italy in North Africa, British forces entering Libya on December 13, 1940."
Step-by-step explanation:
Theirs not much I can explain, the answer says it all.