Kuka and his groups were defending a secondary tower in front of the main tower .
At the head of a small group , Oso Kuka arrived on the battlefields where 8,000 Montenegrin soldiers had been besieging the fort of Vranjina .
Kuka and Oso Kuka 's groups were defending a secondary tower in front of the main tower .
At the head of a small group , Oso Kuka arrived on the battlefields where 8,000 Montenegrin soldiers had been besieging the fort of Vranjina .