Fascist Italy invaded Greece from Albania on 28 October 1940. However, the invasion was quickly turned into a humiliating defeat for the Italians and the Greek forces managed to penetrate deep into Albanian territory. On 6 April 1941, Germany attacked Greece and the Greek forces fell back quickly under the astonishing firepower of the Blitzkrieg. Immediately following their victory, the occupation powers divided the country into 3 zones between which any movement of goods and people was strictly prohibited. The Germans occupied parts of Athens, the region around Thessaloniki, a few strategic outposts in the Aegean and the island of Crete, the Bulgarians held the northern regions of Thrace and Eastern Macedonia, while the Italians controlled most of the mainland and the Ionian Islands.