An unprecedented number of Western women have recently joined the Islamic State of Iraq and Syria (ISIS). The group has envisaged strictly non-combat roles for them, but violence is an essential part of their embraced ideology and several signs suggest that they could claim a more militant role. Their marginalization, however, is essential for the preservation of ISIS's power system and it is consequently unlikely that it would accommodate such aspiration, at least in the areas of the proclaimed caliphate. It could be different in the West, where women returning from conflict areas or those, even more numerous, anxious to join but unable to travel, could engage in violent acts.
Peresin, Anita and Alberto Cervone. 2015. "The Western Muhajirat of ISIS." Studies in Conflict & Terrorism 38 (April): 495-509. http://www.tandfonline.com/doi/abs/10.1080/1057610X.2015.1025611