 The fighting took place in three main sectors.The Japanese 15th Division's attacks from the north were broken when infantry from the 5th Indian Division and M3 Lee tanks recaptured a vital hill at Nungshigum, which overlooked the main airstrip at Imphal, on 13 April.Fighting between Yamamoto Force and the reduced 20th Indian Division swayed back and forth through the hills on either side of the main Imphal-Tamu road throughout the month.