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If this question concerns why the USSR collapsed in '91, its because the Soviets went (or were going) bankrupt.
The USSR took over Czechoslovakia on August 20, 1968.
1980.
In June 1941.
Stalin was extremely effective at modernizing and industrializing the USSR. He had several 5 year plans for improving the USSR and he carried them out. He took Russia from the 19th century into the 20th century.
The U.S.S.R was dis-banded in 1991.
India borrowed the concept of Five Year Plans from the Soviet Union. The first Five Year Plan in India was launched in 1951, inspired by the economic planning model of the Soviet Union under Joseph Stalin.
To industrialize and modernize the USSR.
Five-Year-Plan
1985, according to Encyclopedia Britannica.
November 3, 1957
The USSR Luna 10, 1966