Nuštar is a village and municipality in eastern Croatia, located northeast of Vinkovci and west of Vukovar, on the route D55. The population of Nuštar is 3,639, with a total of 5,772 people in the municipality, which also includes the nearby villages of Cerić and Marinci. Nuštar is underdeveloped municipality which is statistically classified as the First Category Area of Special State Concern by the Government of Croatia.

The Battle of Vukovar was an 87-day siege of Vukovar in eastern Croatia by the Yugoslav People's Army (JNA), supported by various paramilitary forces from Serbia, between August and November 1991. Before the Croatian War of Independence the Baroque town was a prosperous, mixed community of Croats, Serbs and other ethnic groups. As Yugoslavia began to break up, Serbia's President Slobodan Milošević and Croatia's President Franjo Tuđman began pursuing nationalist politics. In 1990, an armed insurrection was started by Croatian Serb militias, supported by the Serbian government and paramilitary groups, who seized control of Serb-populated areas of Croatia. The JNA began to intervene in favour of the rebellion, and conflict broke out in the eastern Croatian region of Slavonia in May 1991. In August, the JNA launched a full-scale attack against Croatian-held territory in eastern Slavonia, including Vukovar.