1941 : British forces arrive in Greece On this day, a British expeditionary force from North Africa lands in Greece. In October 1940, Mussolini's army, already occupying Albania, invaded Greece in what proved to be a disastrous military campaign for the Duce's forces. Mussolini surprised everyone with this move against Greece, but he was not to be upstaged by recent Nazi conquests. According to Hitler, who was stunned by a move that he knew would be a strategic blunder, Mussolini should have concentrated on North Africa by continuing the advance into Egypt. The Italians paid for Mussolini's hubris, as the Greeks succeeded in pushing the Italian invaders back into Albania after just one week, and the Axis power spent the next three months fighting for its life in a series of defensive battles. Mussolini's precipitate maneuver frustrated Hitler because it opened an opportunity for the British to enter Greece and establish an airbase in Athens, putting the Brits within striking distance of valuable oil reserves in Romania, which Hitler relied upon for his war machine. It also meant that Hitler would have to divert forces from North Africa, a high strategic priority, to bail Mussolini out of Greece-and postpone Hitler's planned invasion of the Soviet Union. The Brits indeed saw an opening in Greece, and on March 7, 1941, Prime Minister Winston Churchill diverted troops from Egypt and sent 58,000 British and Aussie troops to occupy the Olympus-Vermion line. But the Brits would be blown out of the Pelopponesus Peninsula when Hitler's forces invaded on the ground and from the air in April. Thousands of British and Australian forces were captured there and on Crete, where German paratroopers landed in May.