Lenin and Stalin repeatedly spoke out against the idea that you could export revolution to other countries. In the Baltics, for example, the working-class had already established soviet power during the civil war period, but this power was overthrown by counter-revolutionaries. The Soviets did not "invade" the Baltics in 1940.
As Anna Louise Strong described it (quoted in Bonosky,
Devils in Amber: The Baltics, p. 93:
Quote:In early June the Soviet Union had presented an ultimatum, demanding the formation of a government in Lithuania which would fulfill the treaty of mutual assistance signed the previous autumn. The ultimatum was accepted and, on June 15, a considerable force of the Red Army entered the country where smaller units had been present since the signing of the treaty. Tanks, cavalry, infantry in trucks rolled through the streets of Kaunas and passed on to appropriate camping places. They did not mix with the Lithuanians' internal life at all. The Red Army gave concerts and dances to the Lithuanian army, as allied armies should. Otherwise it was known to be out in the woods near the border.
But long-oppressed Lithuanians, whose champions had been thrown into prison for the fourteen years of the Smetona dictatorship, took heart and began to talk and organize. President Smetona fled; Prime Minister Markys thus became president, appointed Justas Paleckis, a brilliant progressive journalist, as prime minister and himself resigned. Thus Paleckis in turn became president and appointed a cabinet of ministers consisting of well-known intellectuals, later adding a few Communists.
Quote:Paleckis' first decree set free about a thousand political prisoners-- including Communists and Communist sympathizers. Within a week after Paleckis came to power, the first of the big popular demonstrations took place. Tens of thousands of workers marched through the streets of Kaunas demanding the legalization of the Communist Party, and secured it.
Originally the Soviets had just wanted to ensure that Lithuania, Latvia and Estonia would not join the Axis in the coming war, and felt that this could be achieved by binding the bourgeois regimes of those countries to the aforementioned treaty. The working-classes of those countries took matters into their own hands and the Soviets decided to support them.
As for West Byelorussia and West Ukraine, the Polish state collapsed when the Nazis invaded, prompting the Soviets to move into areas where they were welcomed by the Byelorussian, Ukrainian and Jewish inhabitants and which the Polish bourgeois state had taken from Byelorussia and the Ukraine a decade earlier. This was hardly a case of exporting revolution beyond the fact that the revolutionary processes in the Ukraine and Byelorussia were extended to the rest of their national territory.