Drazen is a tall Yugoslavian man who has been recruited to be a Soviet agent and takes his training as part of Khristo's unit. It is Kulic who creates the code BF 825, inscribing it on the inside panel of a train that takes Unit 8 back to Moscow after the training exercises at Belov. Kulic is in charge of a resistance unit in Madrid, but is betrayed by his own Soviet leaders and is badly injured. He retreats to Yugoslavia where he mounts his own fights against the Germans and the Russians.