 The Partisans overran portions of the base , retreating before daybreak after the arrival of German reinforcements from Vrtoče and Kulen Vakuf . The brigade reportedly captured four howitzers , two mortars , a heavy machine gun , ten light machine guns , five rifles , a mobile radio and 29 enemy soldiers , and Stützpunkt Podglavica reported 31 German soldiers missing after the attack . The Germans described the night attack as eerie , with female Partisans ' shrill shouts of " Forward ! " ( Serbo @-@ Croatian : <unk> ! ) . The battle at Prkosi was the first major offensive action by the 10th Krajina Brigade ; in 1944 , they participated in the liberation of Belgrade . 
