Almost a month after the allies secured Sicily; they began their invasion of Italy, with the first landing at Salerno on September 9, 1943. The landing, commanded by General Mark Clark, met little resistance in most areas, but the Germans put up a fierce fight in a few pockets and prevented the allies from moving off the beaches. The allied invasion eventually stalled and heavy fighting ensued. However, the Germans were unable to bear the allied air attacks and began to withdraw on September 16. The allies were then able to expand their beachhead and, within two week, enter the city of Naples. The Italian campaign had begun.