During the Battle of Imphal all supplies and reinforcements had to be flown in between 29 March and 22 June 1944 with RAF Regiment units providing vital airfield defence. Following the failure of the Japanese Operation U-Go it was decided to pursue the shattered remnants of the Japanese 15th Army into Burma during the monsoon, in average rainfall of per day and rifle flights were sometimes attached to advancing Indian Army and British East African units, to gain experience in the jungle. Units of 1307 Wing were flown into the newly captured and tactically vital Meiktila airfield on 1 March 1945. Only a roughly box, shared with the army and some United States anti-aircraft artillery, could be held at night and the airfield had to be cleared of enemy each morning before flying could start. As one of the RAF Regiment's proudest battle honours, this three-week battle destroyed the Japanese hold on northern Burma.