Foreigners are involved in actual combat in the eastern part of Ukraine. They do not, however, constitute “NATO’s foreign legion” nor the “Donbass international brigades,” as their numbers likely do not exceed 300 on either side of the conflict. Interestingly enough, many of the European foreign fighters from both sides share common ideological roots. They, as a group or as lone individuals, might constitute a threat to European security and must be closely monitored - writes Kacper Rękawek in his latest analysis