World War II: The Empire of Vietnam, a short-lived Japanese puppet state, is established.

The Empire of Vietnam, also known as Vietnamese Empire was a short-lived puppet state of Imperial Japan between March 11 and August 25, 1945. It was a member of the Greater East Asia Co-Prosperity Sphere. It was ruled by the Nguyễn dynasty and created when Emperor Bảo Đại declared independence for Vietnam from French protection. At the end of its existence, on 14 August 1945, the empire also successfully reclaimed Cochinchina as part of Vietnam.