Due to its position, the city of Vukovar has been the center of major migration movements and has always been a multicultural, multiethnic and multi-confessional city. The coexistence of a large number of different ethnic groups was the dominant value and included strong social relations such as friendships, godparents, and marital ties. However, the Homeland War changed the interethnic relations and identities of its inhabitants. The aim of this paper is to re-examine today's interethnic relations and identification processes in Vukovar on the example of Croatian-Serbian relations. It has been shown that direct and / or indirect experiences of war still shape interethnic relations and encourage and maintain social division on the basis of ethnicity. The emphasized division into "we" and "they" indicates that ethnic identities play an important role in the everyday life of the people of Vukovar. The paper presents the most noticeable divisions, which relate to the division of cafes and educational institutions, and will also present language as the main determinant of ethnic division.