 Complete the following phrase:  During the Second World War traffic on PR increased dramatically from 1940 to 1945. The PR main line was a supply route for the North African Campaign that lasted from the Italian attack on Egypt in 1940 until the German surrender in Tunisia in May 1943. In April  May 1941 the Italian air force and German Luftwaffe used Vichy French air bases in the mandated territories of Syria and Lebanon as staging posts to support Rashid Alis 