 Complete the following phrase:  Christian East Beirut was ringed by heavily fortified Palestinian camps and East Beirut became besieged by the PLO camps. This situation was remedied by the Kataeb Regulatory Forces most notably the BG Squad that was led by Bachir and their allied Christian militias as they besieged the Palestinian camps embedded in Christian East Beirut one at a time and brought them down. The first was on 18 January 1976 when the heavily fortified 