Battle of the Tennis Court The Battle of the Tennis Court was the turning point in the Battle of Kohima in North East India from April 4 – June 22 , 1944 . By April 5 the British had been forced back onto the Kohima ridge . The Kohima ridge consisted of features such as Garrison Hill , Jail Hill , Field Supply Depot ( FSD ) Hill , and Detail Issue ( DIS ) Hill ; these areas , along with the Deputy Commissioner ( DC ) Charles Pawsey ' s Bungalow , were used as the main lines of defence which was held by 4th Royal West Kents and supporting troops from the Assam Rifles and Assam Regiment . As they were cut off they were supplied by air by the Royal Air Force . The Japanese launched a series of attacks into the north - east region of the defences on April 8 , and by April 9 the British and Indians there had been forced back out of the DC ' s Bungalow to the other side of the tennis court . The other positions came under heavy attack and the perimeter shrunk . On April 13 , the troops defending near the DC ' s bungalow and the tennis court came under increasingly heavy artillery and mortar fire , and had to repel frequent infantry assaults . This area was the scene of some of the hardest , closest and grimmest fighting , with grenades being hurled across the tennis court at point - blank range . But on April 14 the Japanese did not launch an attack and on the 15th British troops on Kohima ridge heard that the British 2nd Division was attacking along the Dimapur - Kohima road and had broken through Japanese road blocks . On the April 17 , the Japanese tried one last time to take the ridge . They successfully captured the FSD to the Garrison Hill positions . But on the morning of April 18 British artillery opened up from the west against the Japanese positions , which stopped the Japanese attacks . Elements of the British 2nd Division , 161st Brigade and tanks from XXXIII Corps pushed into the area north - west of Garrison Hill and forced the Japanese from their positions . The road between Dimapur and Kohima had been opened , and the siege was lifted . The Japanese who had been fighting to capture Kohima did not retreat at once , many of them stayed in the positions which they had captured and fought tenaciously for several more weeks . By the morning of May 13 , most of the positions in the Kohima region had been re - taken by the British and Indian forces ; a few , among them the DC ' s bungalow , were still holding out against the Dorsets and their supporting tanks . Around May 15 the Japanese 31st Division began to withdraw and fresh British troops from XXXIII Corps began to reinforce and relieve members of the 2nd Division and 33rd and 161st Indian Brigades . The " battle of the Tennis Court " was over and troops of the British Fourteenth Army began an advance , with the relief of Imphal , which would continue until Burma had been recaptured . The fighting within the 6th Brigade ' s area was documented by Major Boshell , who commanded ' B ' Company , 1st Royal Berkshires , in the 6th Infantry Brigade : This battle was ultimately to prove to be the turning point of the Battle of Kohima which was the turning point of the Burma Campaign . Earl Louis Mountbatten , the Supreme Allied Commander in the theatre , described Kohima as