The fighting in the Burma campaign in 1944 was among the most severe in the South-East Asian Theatre of World War II. It took place along the borders between Burma and India, and Burma and China, and involved the British Commonwealth, Chinese and United States forces, against the forces of Imperial Japan and the Indian National Army. British Commonwealth land forces were drawn primarily from the United Kingdom, British India and Africa.
The Allies had overcome the logistic and organisational difficulties which had crippled their earlier efforts, and they were preparing to invade Japanese-occupied Burma at several widely separated points. The Japanese forestalled them by launching their own offensive into India, and this offensive became larger in scope than originally intended.