https://news.stanford.edu/pr/2011/pr-famine-040411.html

https:

//en.m.wikipedia.org/wiki/Russian_famine_of_1921–22he Russian famine of 1921–22, also known as Povolzhye famine, was a severe famine in Russia which began in early spring of 1921 and lasted through 1922. This famine killed an estimated 5 million, primarily affecting the Volga and Ural River regions.[1][2]

The famine resulted from combined effects of economic disturbance through the disturbances of the Russian Revolution—and Russian Civil War with its policy of War Communism, especially prodrazvyorstka, exacerbated by rail systems that could not distribute food efficiently. The famine's primary causes were due to severe flooding in the Volga region in 1921, as well as the exacerbation of the Russian Civil War. After World War 1, famine became a country wide problem.