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In page Yugoslavia:

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The 1946 Constitution of the Federal People's Republic of Yugoslavia, modelled after the Constitution of the Soviet Union, established six republics, an autonomous province, and an autonomous district that were a part of Serbia. The federal capital was Belgrade. The policy focused on a strong central government under the control of the Communist Party, and on recognition of the multiple nationalities.[3] The flags of the republics used versions of the red flag or Slavic tricolor, with a red star in the centre or in the canton.[citation needed]