The Japanese occupation of Burma was the period between 1942 and 1945 during World War II, when Burma was occupied by the Empire of Japan. The Japanese had assisted formation of the Burma Independence Army, and trained the Thirty Comrades, who were the founders of the modern Armed Forces (Tatmadaw). The Burmese hoped to gain support of the Japanese in expelling the British, so that Burma could become independent.

The Burma Independence Army (BIA) was a pro-Japanese and revolutionary army that fought for the end of British rule in Burma by assisting the Japanese in their conquest of the country in 1942 during World War II. It was the first post-colonial army in Burmese history. The BIA was formed from a group known as the Thirty Comrades under the auspices of the Imperial Japanese Army after training the Burmese nationalists in 1941. The BIA's attempts at establishing a government during the invasion led to it being dissolved by the Japanese and the smaller Burma Defence Army (BDA) formed in its place. As Japan guided Burma towards nominal independence, the BDA was expanded into the Burma National Army (BNA) of the State of Burma, a puppet state under Ba Maw, in 1943.