Fighters of the Ukrainian volunteer battalions, warring on Donbass region with pro-Russian separatists, rally in front of the parliament's building in Kiev on April 19, 2018, as they demand the lawmakers to approve a bill N6677 giving them the social status "War Participants". / AFP PHOTO / Sergei SUPINSKY

Fighters of the Ukrainian volunteer battalions, warring on Donbass region with pro-Russian separatists, rally in front of the parliament's building in Kiev on April 19, 2018, as they demand the lawmakers to approve a bill N6677 giving them the social status "War Participants". / AFP PHOTO / Sergei SUPINSKY

Fighters of the Ukrainian volunteer battalions, warring on Donbass region with pro-Russian separatists, rally in front of the parliament's building in Kiev on April 19, 2018, as they demand the lawmakers to approve a bill N6677 giving them the social status "War Participants". / AFP PHOTO / Sergei SUPINSKY

Fighters of the Ukrainian volunteer battalions, warring on Donbass region with pro-Russian separatists, rally in front of the parliament's building in Kiev on April 19, 2018, as they demand the lawmakers to approve a bill N6677 giving them the social status "War Participants". / AFP PHOTO / Sergei SUPINSKY

Fighters of the Ukrainian volunteer battalions, warring on Donbass region with pro-Russian separatists, rally in front of the parliament's building in Kiev on April 19, 2018, as they demand the lawmakers to approve a bill N6677 giving them the social status "War Participants". / AFP PHOTO / Sergei SUPINSKY

Fighters of the Ukrainian volunteer battalions, warring on Donbass region with pro-Russian separatists, rally in front of the parliament's building in Kiev on April 19, 2018, as they demand the lawmakers to approve a bill N6677 giving them the social status "War Participants". / AFP PHOTO / Sergei SUPINSKY