An Egyptian Communist Party was first established in the 1918-1920 period, but was not active again until after 1939. In this period, through the late 1950s, there were several communist organizations, the principal one being the Democratic Union for National Liberation. Following the 1952 revolution, relations with the Nasser regime were often problematic. Two labor leaders including one Communist, were executed at Kafr al-Dawwar in 1952, and in 1954-1955 a number of cadre were jailed. In late 1958 there was a fusion of the various groupings under the name of the Egyptian Communist Party, prompted in large degree by their shared opposition to the formation of the United Arab Republic with Syria.