Answer:
The only country behind the Iron Curtain that wasn't part of the Soviet Alliance known as the Warsaw Pact was Yugoslavia, as it was a neutral nation.
Step-by-step explanation:
The Socialist Federal Republic of Yugoslavia was born after World War II after the Communist Partisans led by Josip Broz Tito drove out the Germans and Italians who had occupied the Kingdom of Yugoslavia and defeated the Croatian and Serb nationalist forces.
After the war, land reform was carried out, not collectivization modeled on the Soviet Union, but the government supported the smallholder class and emphasized its importance alongside and at the expense of industrial workers.
The economic system of socialist Yugoslavia differed significantly from that of both the Soviet Union and the West. It was a socialist market economy, in which the factories were under the control of the communities formed by the workers, and used their profits for their own needs and paid taxes to the state. The companies also competed in the market.