 Within a fortnight, the division HQ and such supporting units as had been allocated were used to form the 21st Indian Infantry Division, as an emergency measure during the Japanese invasion of India (which was codenamed Operation U-Go, and which resulted in the battles of Imphal and Kohima).By 15 July, the crisis was clearly over, and the airborne division's formation was resumed.On 15 September 1944, the existing 50th Indian Parachute Brigade was allocated to the division.