 Complete the following phrase:  During World War II, the British used Chittagong as an important frontline military base in the Southeast Asian Theater. Frequent bombardment by the Japanese Air Force, notably in April 1942 and again on 20 and 24 December 1942, resulted in military relocation to Comilla. It was a critical air, naval and military base for Allied Forces during the Burma Campaign against Japan. The Imperial Japanese Air Force carried out air raids on Chittagong in April and May 1942, in the run up to the aborted Japanese invasion of Bengal. British forces were forced to temporarily withdraw to Comilla and the city was evacuated. After the 