In the context of legacies of mass violence and political oppression during the recent past in the Western Balkans (Albania, Bosnia and Herzegovina, Kosovo, North Macedonia, Montenegro and Serbia), history teaching is seen as an important factor in building sustainable peace and democracy. Caught between various national and international policy actors, history teaching has been subject to frequently overlapping and inconsistent reforms. Despite prolific research on history education in the Western Balkans teachers' experiences of history education and its transformation have largely remained unexamined. This paper explores history teachers' perceptions of and approaches to the topics they find difficult to teach. The paper draws on data gathered through an online survey that yielded 793 responses from history teachers and 14 regional history education expert interviews. The results show which topics teachers consider difficult to teach in six Western Balkan countries, and how certain individual characteristics (e.g. religiousness and level of education) and school characteristics (e.g. urban or rural and a monocultural or multicultural environment) link to the roles teachers assume when teaching controversial topics.