Tito–Stalin Split

The Tito–Stalin Split, or Yugoslav–Soviet Split, was a conflict between the leaders of SFR Yugoslavia and the Soviet Union, which resulted in Yugoslavia's expulsion from the Communist Information Bureau (Cominform) in 1948. This was the beginning of the Informbiro period, marked by poor relations with the USSR, that came to an end in 1955.

It was said by the Soviets to be caused by Yugoslavia's disloyalty to the USSR, while in Yugoslavia and the West it was presented as Josip Broz Tito's national pride and refusal to submit to Joseph Stalin's will in making Yugoslavia a Soviet satellite state. Scholars now emphasize the cause was Stalin's rejection of Tito's plans to absorb Albania and Greece in cooperation with Bulgaria, thereby setting up a powerful Eastern European bloc outside Moscow's control.

More information on the Wikipedia page.