The Soviet Union introduces its first five-year plan.

The first five-year plan of the Union of Soviet Socialist Republics (USSR) was a list of economic goals, implemented by Communist Party General Secretary Joseph Stalin, based on his policy of socialism in one country. Leon Trotsky had delivered a joint report to the April Plenum of the Central Committee in 1926 which proposed a program for national industrialisation and the replacement of annual plans with five-year plans. His proposals were rejected by the Central Committee majority which was controlled by the troika and derided by Stalin at the time. Stalin's version of the five-year plan was implemented in 1928 and took effect until 1932.