Making good on promises to the Italian people to make Italy a world power, Italian troops invaded and easily conquered Ethiopia. Italy left the League of Nations when the action was condemned.
Because of Germany's central position in Europe, and the growing war economy, Hitler slowly began to gain the dominant role as dictator of Europe. With quick and easy victories in the reoccupation of the Rhine, Austria, and the Saarland, Mussolini was only too happy to represent Italy at the Munich Conference that broke up Czechoslovakia.
When war broke out in 1939, Mussolini didn't immediately declare war. Only when it became apparent that France would fall in June 1940 did Italy invade. this committed Italy to a war two years ahead of the Italian General Staff’s expectations, and her armed forces were not fully ready for the coming battles in the Mediterranean and Russia.
In 1940 and 1941 the Royal Navy under Admiral Cunningham, based at Malta, inflicted heavy damage on the Italian naval base at Taranto and in land fighting in Libya. An ill-planned invasion of Greece resulted in a German invasion in April 1941 to prevent Mussolini's mistake from giving England a base of operations on the European mainland. These operations cost the Italians in men and materíel and embarrassed Mussolini. The German soldiers were openly contemptous of their Italian allies, and they never worked out cooperation with their armed forces. Italian sea forces could not deliver promised supplies to Rommel in North Africa nor to their soldiers in the Eastern Front.
Meanwhile, Germany was planning to invade the Soviet Union and Mussolini committed several divisions to Operation Barbarossa. The horrific losses on the Eastern Front further eroded Mussolini’s support with the King and the Italian people.
On July 25, 1943, in the face of the Allied invasion of Sicily, the Fascist Grand Council, including Mussolini’s son-in-law, voted to oust him, and he was arrested. SS colonel Otto Skorzeny rescued Mussolini and the Italian Fascist State was declared by Hitler. Wholesale deportations of Jewish communities began when Germany occupied Italy in 1943. Italian units switched sides and began fighting against the Germans.
Mussolini controlled less and less of Italy as the Allies made bitter progress up the Italian peninsula. Rome fell on June 5, 1944. But with winter cold and mountainous terrain, Italy was well suited for defense.
With so many losses on all fronts, Germany could not adquately supply its Italian stations, and they pulled back into Germany. Mussolini was atempting to fly to exile in Switzerland when he was arrested by partisians near Milan on April 27, 1945. He and his entourage were executed and hung by their feet for public display.