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Most wanted by Interpol during the 1970s and ’80s, Arkan, also known as Željko Ražnatović, was a Serbian paramilitary leader and warlord. He gained notoriety for his involvement in the Yugoslav Wars, where he commanded paramilitary forces responsible for numerous atrocities, including ethnic cleansing and war crimes. Arkan's reputation as a ruthless and brutal fighter made him a significant figure in the conflicts of the former Yugoslavia.