Similar countries are often expected to respond to threats in similar ways. Nevertheless, in Europe alone, similar countries have responded significantly different to the threat of terrorism. The purpose of this thesis is to examine how strategic culture, based on five elements (dominant threat perception; core tasks of the armed forces; willingness to use force; civil-military relation, and public opinion) have influenced the role of the armed forces in domestic counterterrorism in Belgium and Sweden. Albeit previous research has addressed the role of the armed forces in domestic security and counterterrorism, it has not empirically conducted a systematic comparison of two countries with differing roles. Moreover, the theoretical explanations have been insufficient in explaining why some countries use their armed forces whilst others do not. Thus, by employing a comparative case study, utilizing a qualitative content analysis aimed at analysing strategic and defence documents, articles, and previous research, I sought to investigate how strategic culture have influenced the role of the armed forces in domestic counterterrorism between 2014-2020, something that has been largely neglected in previous research. The findings demonstrated differences in all five elements, indicating that strategic culture likely influence the role of the armed forces in Sweden and Belgium.