The Siege of Doboj (Serbo-Croatian: Opsada Doboja) was a military engagement fought between the Yugoslav People's Army and Bosnian Serb civilians and Bosniak forces defending the city of Doboj and its surroundings during the War in Bosnia. The Bosniak forces started its advance on 31 May 1992. The Muslims attacks and bombardment of Doboj culminated on 10 June 1992.