Japanese invasion of Manchuria: Japan leaves the League of Nations after it approves the Lytton Report that ruled in favour of China.

The Empire of Japan's Kwantung Army invaded the Manchuria region of the Republic of China on 18 September 1931, immediately following the Mukden incident, a false flag event staged by Japanese military personnel as a pretext to invade. At the war's end in February 1932, the Japanese established the puppet state of Manchukuo. The occupation lasted until mid-August 1945, towards the end of the Second World War, in the face of an onslaught by the Soviet Union and Mongolia during the Manchurian Strategic Offensive Operation. With the invasion having attracted great international attention, the League of Nations produced the Lytton Commission to evaluate the situation, with the organization delivering its findings in October 1932. Its findings and recommendations that the Japanese puppet state of Manchukuo not be recognized and the return of Manchuria to Chinese sovereignty prompted the Japanese government to withdraw from the League entirely.

The League of Nations was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference that ended the First World War. The main organisation ceased operations on 18 April 1946 when many of its components were relocated into the new United Nations (UN) which was created in the aftermath of the Second World War. As the template for modern global governance, the League profoundly shaped the modern world.

The Report of the Commission of Enquiry, commonly referred to as the Lytton Report refers to the findings of the Lytton Commission, entrusted in 1931 by the League of Nations in an attempt to evaluate the Mukden Incident, which was used to justify the Empire of Japan's seizure of Manchuria.

March 27 is the 86th day of the year in the Gregorian calendar; 279 days remain until the end of the year.