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 Karantina camp, located near the strategic Beirut Harbor, was invaded: About 1,000 PLO fighters and civilians were killed. The Palestinian PLO and al-Saiqa forces retaliated by attacking the isolated defenseless Christian town of Damour about 20 miles south of Beirut on the coast, during the Damour massacre in which 1,000 Christian civilians were killed and 5,000 were sent fleeing north by boat, since all roads were blocked off. The Maronites retaliated with the invasion of the largest and strongest Palestinian refugee camp, Tel al-Zaatar that same year. Bachir, with his KRF militia units, also fought against the PLO and LNM militias at the Battle of the Hotels in central Beirut. The most important battle won by the Phalange for the control of the hotel district was the fighting over the possession of the Holiday Inn, due to its important strategic location. Before that battle, the Holiday Inn had been occupied by the PLO.