Following the rejection by both sides of the Z-4 plan for reintegration, the RSK's end came in 1995, when Croatian forces gained control of SAO Western Slavonia in Operation Flash (May) followed by the biggest part of occupied Croatia in Operation Storm (August). The Krajina Serb Supreme Defence Council met under president Milan Martić to discuss the situation. A decision was reached at 16:45 to "start evacuating the population unfit for military service from the municipalities of Knin, Benkovac, Obrovac, Drniš and Gračac." The RSK was disbanded and most of its Serb population (from 150,000 to 200,000 people) fled. Only 5,000 to 6,000 people remained, mostly the elderly. Croatian historian Ivo Goldstein wrote, " The reasons for the Serb exodus are complex. Some had to leave because the Serb army had forced them to, while others feared the revenge of the Croatian army or of their former Croat neighbors, whom they had driven away and whose homes they had mostly looted (and it was later shown that this fear was far from groundless).".