Vladimir Putin slams 'treason' from Wagner mercenary groupThe Wagner mercenary group’s shock rebellion has challenged Vladimir Putin’s rule over Russia, experts have said. The immediate may have been diffused but this is a dangerous game-changer for Putin and his days are now, in my view, numbered. The luck that Ukraine should now have needs to be grasped and utilised to its best ability.”Yevgeny Prigozhin, the owner of the Wagner Group military companyWho are the Wagner Group of Russian mercenaries in Ukraine? Wagner Group founder Yevgeny Prigozhin sparked fears of a military coup in Russia on Friday when he called for the defence minister to be ousted. The Wagner group is a private military company of mercenaries, including many ex-convicts, who have fought alongside Russian forces in Ukraine.