Italy was poorly prepared for war and increasingly fell under Nazi dictation. After initial success in British Somaliland, Egypt, the Balkans (despite the initial defeat against Greece), and eastern fronts, Italian military efforts failed in North and East Africa, and Germany had to intervene to rescue its neighbor. After the Allies invaded and took Sicily and southern Italy in 1943, the regime collapsed. Mussolini was arrested and the King appointed General Pietro Badoglio as new Prime Minister. They later signed the armistice of Cassibile and banned the Fascist Party. However Germany moved in, with the Fascists' help, occupying Italy north of Naples. German paratroopers rescued Mussolini and Hitler set him up as head of a puppet government the Italian Social Republic, often called the Salò Republic; a civil war resulted. The Germans gave way slowly, for mountainous Italy offered many defensive opportunities.