Some of the most important events of war in eastern Croatia are Battle of Vukovar, Vukovar massacre, and Borovo Selo killings in which in first two cases was killed significant number of civilians. Large part of Croats were forced to leave their homes in Eastern Slavonia, Baranya and Western Syrmia, and their property was looted and destroyed. Some have been captured and imprisoned for some time in Serbia, and some were killed there. Tens of thousands of Croats in this period left Podunavlje. At the same time in Podunavlje came tens of thousands Serbian refugees fleeing from war in the rest of Croatia. After the war ended local population get a difficult task of rebuilding coexistence in which were included a number of organizations such as the Organization for Security and Co-operation in Europe and embassies of foreign countries. However, although progress is slow at times international community has assessed this process as relatively successful. After the war, a number of towns and municipalities in the region were designated Areas of Special State Concern.