 The Germans had a fortified base , Stützpunkt Podglavica , near Podglavica in the village of Prkosi ( between Vrtoče and Kulen Vakuf ) . The base , with about 500 members of the 373rd ( Croatian ) Infantry Division and an artillery battery , secured the roads from Petrovac to Bihać and Kulen Vakuf . In September 1943 , the 2nd and 3rd Battalions of the 10th Krajina Brigade and a battalion of the Drvar – Petrovac Partisan Detachment were directed to attack it . Bursać volunteered to throw hand grenades at the pillboxes and machine @-@ gun nests protecting the base . Although her company commander objected because she still appeared ill , Bursać insisted on throwing the grenades . The three Partisan battalions attacked the base from three directions on 18 September at 11 pm . Bursać and her group of grenade throwers destroyed several pillboxes before they came under fire from another . They destroyed the pillbox , but Bursać received a serious leg wound and was carried to a less exposed area . 
