As for adults, Russian volunteers fought and died for the Serbs during the recent conflict. As far as I know, they were not paid lavishly for this, they were not mercenaries. It was simpler - and certainly less dangerous - to earn more in Russia even in those difficult times. This means that something inside forced these people to go to a foreign country and die there for that country's people. These are very serious deeds. Interesting - wish there was more info. I wonder if there would be any volunteers if Serbia created an international brigade to fight islam in Kosovo...