Organization of Ukrainian Nationalists (OUN)
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The Organization of Ukrainian Nationalists (OUN) is described in the snippets as an extremist organization banned in Russia. It is associated with figures such as Andriy Melnyk, who has been labeled a hero by some and condemned as a fascist by Russian officials. The OUN is linked to the Ukrainian Insurgent Army (UPA), also banned in Russia, and its members are commemorated in Ukraine despite international criticism.