Communism and Football, a new documentary on BBC Four, tells the fascinating story of how the Soviet authorities sought to exercise control over the national sport and use it for their own ends.
Throughout the 20th Century, the football grounds of Eastern Europe became battlegrounds as ruthless politicians tried to use football to lend legitimacy to communist rule.
In this film, footballers from Russia, Hungary and East Germany recall how the beautiful game was manipulated by ruthless communist leaders.
They reveal how the careers of several great footballers from behind the Iron Curtain were destroyed simply because they refused to co-operate with the Eastern Bloc's most brutal totalitarian regimes.
Communism and Football
Tuesday 11 April, 2100 BST, BBC Four