first few months of the war, the Israeli forces grew steadily as a result of the progressive mobilisation of Israeli society and the influx of an average of 10,300 immigrants each month. By the end of 1948, the Israel Defense Forces had 88,033 soldiers, including 60,000 combat soldiers. After the invasion: France allowed aircraft carrying arms from Czechoslovakia to land on French territory in transit to Israel, and permitted two arms shipments to ‘Nicaragua’, which were actually intended for Israel. Czechoslovakia supplied vast quantities of arms to Israel during the war, including thousands of vz. 24 rifles and MG 34 and ZB 37 machine guns, and millions of rounds of ammunition. Czechoslovakia supplied fighter aircraft, including at first ten Avia S-199 fighter planes. The Haganah readied twelve cargo ships throughout European ports to transfer the accumulated equipment, which would set sail as soon as the British blockade was lifted with the expiration of the Mandate. Following Israeli independence, the Israelis managed to build three Sherman tanks from scrap-heap material found in abandoned British ordnance depots. The Haganah also managed to obtain stocks of British weapons due to the logistical complexity of the British withdrawal, and the corruption of a number of officials. After the first truce: By July 1948, the Israelis had established an air force, a navy, and a tank battalion. On 29 June 1948, the day before the last British troops left Haifa, two British soldiers sympathetic to the Israelis stole two Cromwell tanks from an arms depot in the Haifa port area, smashing them through the unguarded gates, and joined the IDF with the tanks. These two tanks would form the basis of the Israeli Armored Corps. After the second truce: Czechoslovakia supplied Supermarine Spitfire fighter planes, which were smuggled to Israel via an abandoned Luftwaffe runway in Yugoslavia, with the agreement of the Yugoslav government. The airborne arms smuggling missions from Czechoslovakia were codenamed Operation Balak. Arab forces At the invasion: In addition to the local irregular Palestinian militia groups, the five Arab states that joined the war were Egypt, Transjordan, Syria, Lebanon and Iraq sending expeditionary forces of their regular armies. Additional contingents came from Saudi Arabia and Yemen. On the eve of the war, the available number of Arab troops likely to be committed to war was between 23,500 and 26,500 (10,000 Egyptians, 4,500 Jordanians, 3,000 Iraqis, 3,000–6,000 Syrians, 2,000 ALA volunteers, 1,000 Lebanese,