When the war broke out , the Bosnia and Herzegovina TO was mobilised , but the JNA refused to return its weaponry , which it had confiscated in 1990 . Bosniaks and Bosnian Croats had already left the JNA . The priority for the JNA was the security of its bases , as this had proven to be a vulnerability during the Battle of the Barracks in Croatian War of Independence . At the beginning of April , a number of towns in north-eastern Bosnia fell in quick succession to a combination of JNA , Serb volunteer and Bosnian Serb forces . These included Bijeljina , Zvornik , Višegrad , and Foča . The capture of each town was followed up by massacres and ethnic cleansing of the towns ' Bosniak inhabitants . On 15 April , Bosnian MUP and TO seized the arms , ammunition and equipment of the Tuzla Regional TO in the towns of Srebrenik , Lukavac and in Tuzla itself . By the end of the month , the Bosnian Government had re-organised the Bosnia and Herzegovina TO , incorporating the troops of the Patriotic League . In total , the new force had around 100,000 men , but only about 40,000 – 50,000 small arms and virtually no heavy weapons
Višegrad
Višegrad massacres
1992 Yugoslav People's Army column incident in Tuzla