 At the same time, personnel at the JNA's Borongaj barracks in Zagreb were allowed to evacuate in return for free passage of a convoy carrying humanitarian aid to Vukovar, where the battle to control the city was in progress.After a period of siege with little or no activity, the JNA forces in the Logorište barracks in the Karlovac area broke through the blockade towards the JNA-held territory to the east of the city in the Battle of Logorište, which lasted from 4 to 6 November.The Croatian forces besieging the barracks were more numerous, but the JNA had superiority in armour and artillery.