This thesis aims to investigate how the Russian PMSC the Wagner Group affects conflict severity in countries where they operate. To illustrate their impact two countries, The Central African Republic and Syria, will be compared to each other. PMSCs and their effect on conflict dynamics have been studied before, usually by using a quantitive method, and the Wagner Group since their debut to the daylight in 2014 have also received scholarly attention. However, these two fields have not been linked together before and thus will this thesis bring new knowledge to both scientific fields by presenting a qualitative comparative study. The study is based on the social movement theoretical framework of resource mobilization by John D. McCarthy and Mayer N. Zald and sets out to test the theory whitin this new context of conflict dynamics. The result from this thesis shows some correlation between the implementation of the Wagner Group and conflict severity and that resource mobilization can be used to explain changes in conflict dynamics. However, the results isnt´t conclusive, and more research is needed on the subject.