Initially, the armored vehicles still carried the emblems of the JNA and it was only later that they sported the Bosnian Serb flag and badges showing the Bosnian Serb coat-of-arms. At the same time, the members of the units - officers and soldiers alike - had been wearing Bosnian Serb badges on their uniforms from the beginning. In April 1993 Obrenović was promoted to the post of permanent Chief of Staff of 1st Zvornik Infantry Brigade. On April 16, 1995 Obrenović was wounded in his left leg during combat operations. He was evacuated and underwent surgery as well as extensive post-operative treatment. A few months later, a commander and another officer visited him at his house while he was still on sick leave, asking him to interrupt his leave and return to brigade command, as preparations were under way to attack the besieged Srebrenica enclave, then designated a United Nations-protected "safe area". Srebrenica was a base of operations for largely ethnic Bosniak Army of the Republic of Bosnia and Herzegovina (ARBiH) 28th Mountain Division - an undisciplined, untrained, poorly armed and totally isolated Bosnian government force, now leaderless after Naser Orić and most of his staff left Srebrenica on the orders from Sarajevo. Obrenović returned to duty at Zvornik Brigade command on July 1. Believing that the UN-protected enclaves of Srebrenica and Žepa were never demilitarized, and that they hid what amounted to "five or six brigades" of ARBiH troops and weapons, the VRS Main Staff ordered the Drina Corps command to undertake an operation codenamed Krivaja '95. On July 2, 1995, Obrenović's brigade was given operational orders related to the operation. Detailed orders from Drina Corps regarding his brigade's involvement arrived later that same day. Obrenović drafted Zvornik Brigade deployment details, and a combat group of command and two battalions were set up. The 1st Battalion comprised the Podrinje attachment and the mobile combat group called Drina Wolves. The 2nd Battalion comprised one intervention platoon from all battalions except the fifth, then split into two companies. Captain Vinko Pandurević was in command of the whole brigade involvement. His deputy, Captain First Class Milan "Legenda" Jolović, commanded the Wolves. From July 4 to July 15, 1995 Obrenović acted as deputy commander of the Zvornik Brigade while the commander was gone to Srebrenica during the assault.