SAO Western Slavonia
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|Serbian Autonomous Oblast of Western Slavonia|
|Srpska autonomna oblast
Српска аутономна област
|Self-proclaimed autonomous oblast|
SAO Western Slavonia (central blue area)
within SR Croatia (red).
|Historical era||Breakup of Yugoslavia|
Part of a series on the
|History of Slavonia|
|Croatian War of Independence|
The Serbian Autonomous Oblast of Western Slavonia (Serbo-Croatian: Srpska autonomna oblast Zapadna Slavonija, Српска аутономна област Западна Славонија) was a Serbian self-proclaimed autonomous region (oblast) within Croatia. It was formed on 12 August 1991 and was subsequently included into Republic of Serbian Krajina. It was eliminated and reintegrated into Croatia in May 1995, during Operation Flash.
Shortly after the proclamation of the SAO Western Slavonia, rebel Serb forces, assisted by the Serb-led Yugoslav Army and Serb paramilitary forces (from Serbia and Bosnia-Herzegovina), took Okučani and Daruvar, threatening to sever Slavonia from Croatia proper. As a part of strategy of intimitidating the remaining Croats, they committed massacres in Voćin, Četekovac and Kusonje.
At this time, the area under Serbian control was relatively large, although the majority of the region was hilly and forested with poor infrastructure. During the next months, there was fierce fighting for Pakrac as paramilitaries ethnically cleansed Croats from newly captured Western Slavonic districts. Most of the region was patrolled by poorly equipped Serbian militias drawn from the local Serb villages, and with JNA resources widely distributed at a precarious time, they were not in position to effectively dissect Croatia. On October 31, 1991, Croatian forces launched Operation Otkos 10 securing the Bilogora hills. Following this success, the Croat Operation Orkan 91, on December 12, pushed back the Serb/Yugoslav forces into a small pocket only a fraction of the initial territory controlled. In the operation, Daruvar was taken.
During their retreat, Serbian paramilitaries were found to have committed the Voćin massacre in which between 32  and 45 Croatian civilians were killed. On January 2, 1992, the UN brokered a ceasefire in Sarajevo, it is possible that this stopped the Croatian forces from eliminating the rebel Serb presence in Western Slavonia.
On February 18, 1993, Croatian and local Serb leaders signed the Daruvar Agreement. The Agreement was kept secret and was working towards normalising life for the locals on the battlefield line. However, the rebel Serb authorities from Knin learned of the deal and arrested the rebel Serb leaders responsible for it.
SAO Western Slavonia was eliminated and the area reintegrated into Croatia in two days in May 1995, during Operation Flash. In retaliation for this thorough defeat, Milan Martić launched rockets at Zagreb.
The territory of Western Slavonia under protection by the United Nations included four municipalities: Okučani, Pakrac, Daruvar and Grubišno Polje. The army of the Republic of Serbian Krajina had controlled the municipalities of Okučani and Pakrac.
- Croatian War of Independence
- Breakup of Yugoslavia
- Republic of Serbian Krajina
- Serbian Autonomous Oblasts
- SAO Kninska Krajina
- SAO Eastern Slavonia, Baranja and Western Syrmia
- Socialist Republic of Croatia
- Map of the Republic of Serbian Krajina - map show territory of Western Slavonia controlled by Serb forces (green) and territory of Western Slavonia under UN protection (orange).
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