Although combat in China began as early as 1931, the China-Burma-India Theater didn’t begin until the Japanese invasion of Burma in January of 1942. The timing of this invasion was no accident. Immediately after their attack on Pearl Harbor, the Japanese moved quickly to secure resources to fuel their war machine. Although their initial assault was a spectacular success, the war in Burma would drag on for the remainder of the war and eventually merge with the Chinese theater to form the China-Burma-India Theater.
Picture
General Kawada of the Japanese 31st Division surrenders to the British in Burma.
The China-Burma-India Theater effectively concluded in 1945 with the expulsion of Japanese forces from most of Burma, the completion of the first overland supply shipments to China, and the Soviet invasion of Manchuria.
Picture
Following the expulsion of Japanese troops from strategic locations, work on supply routes would begin.

Related Source

Competing Empires in Burma: A Chronicle of the China-Burma-India Theater of Operations in World War 2

Picture
​ALTHOUGH VIRTUALLY UNKNOWN IN THE WEST, the China-Burma-India (CBI) theater provided the backdrop for some of the most operationally complex, logistically challenging, and politically intriguing operations in World War II. This chronicle excavates the forgotten story of the Allies’ only land-based campaign in the Pacific that lasted from late 1941 to the end of the Second World War. It also tells the story of the war within the war, and how Burmese, Indian, and other Asian subjects were fighting in a war against colonialism as well as in a “total war” between competing empires represented by Allied and Axis powers. Following the catalyst of the Marco Polo Bridge Incident in 1937, Japan launched its invasion of China and the full-scale Second Sino-Japanese War had begun. China became isolated from outside aid due to Japanese naval supremacy and its seizure of Chinese ports. As of late 1941, the Burma Road was China’s only means of securing outside aid. While Japan had mostly isolated China, its low stockpile of critical resources meant that it needed to seize resource-rich Southeast Asian colonies (particularly for rubber, tin, and oil) to continue the Second Sino-Japanese War. Consequently, Japan decided to initiate the “Strike South Campaign” (“Nanshin-ron”), which culminated in the seizure of most of Burma by May 1942. In considerable operational detail, this chronicle captures not only the logistical nightmare of fighting in the CBI theater but also the impossible dilemma confronted by colonial subjects in Asia during an inescapable global conflict. Should they trade a western colonial power for a Japanese version? Should the Burmese National Army betray Japan and ally with the British and Allied forces? Could Japan be trusted to “Free India” within a “Greater East Asian Co-Prosperity Sphere” as the India National Army hoped? This fascinating historical chapter is helpful to understand the postwar independence movements that would follow as well as contemporary events unfolding throughout Asia.​