Since the end of the Cold War, the amount of private military and security companies (PMSCs) involved in armed conflicts has increased rapidly. In armed conflicts, the PMSCs carry out tasks that used to be performed by governmentally armed forces. These include non-coercive as well as coercive activities, ranging from military training and intelligence analysis to offensive combat and interrogation of prisoners (Tonkin, 2012, 1). Meanwhile, it remains unclear to what extent PMSCs increase the severity of armed conflicts (Lees and Petersohn, 2021, 1). It is clear, however, that the activities of PMSCs in armed conflicts impact European land forces and their objectives. In Libya, for instance, Russia has backed the Libyan National Army (LNA) with PMSC forces, among other things. Allegedly, Russian leaders hoped this could help them gain control over oil reserves in Libya, on which several European countries depend. Besides, Libya is located strategically on NATO’s southern flank (Cragin and MacKenzie, 2020). This is just one example of a country where foreign PMSCs and European armed forces are involved in a conflict. The question is how European land forces can anticipate the presence of foreign PMSCs in armed conflicts in Africa, Eastern Europe, and the Middle East. Therefore, this article will focus on the operational rather than the legal and ethical aspects of the activities of PMSCs in armed conflict.