In 1941 Germany defeated the British in Greece (including Crete which Churchill had ordered to hold at all costs), sank so many British ships in the Atlantic that had the British not received American ships and help from the US navy, Britain would have lost the war (in spite of counting with many merchant ships from Norway, Holland, France, Greece, Poland, etc,), had Romania, Hungary, Finland, Lithuania, Bulgaria, etc, as allies (because Stalin stupidly invaded Finland, Bessarabia, etc,), began recovering Libya, closed the Mediterranean to convoys from Gibraltar, destroyed 20,000 Soviet tanks and planes, captured or incapacidated millions of troops and had conquered millions of km2 in the USSR, Greece, Yugoslavia, etc, in record time. So Germany was doing pretty well that year. Had the Japs attacked only the British (whom they rapidly defeated) and not forced the Americans to enter the war (the biggest turning point in the war), the axis would have definitely won.