Stalin forced collectivisation of agriculture which killed millions of people while the industrialization of the country was increasing the Soviet Unions economic growth. The Population suffered greatly during the great terror of the 1930's resulting in the execution of thousands and the exile of millions of people to the gulag system of slave labour camps.
Stalin killed everybody in the army that he did not like and this was called purges. But after all of these purges he made the army and despite the warnings Stalin was not prepared for Hitlers attack on the Soviet Union in jun 1941. He still lead his country to victory although the human cost was very large. After world war two the Soviet Union entered the nuclear age and ruled over an empire which included most of eastern Europe. Stalin died of a stroke on 5 of March 1953.
"Joseph Stalin 1879-1953." BBC News. BBC, n.d. Web. 11 Feb. 2015.
"Gulag: Soviet Forced Labor Camps and the Struggle for Freedom." Gulag: Soviet Forced Labor Camps and the Struggle for Freedom. N.p., n.d. Web. 20 Feb. 2015.