“…Two scholars have thus far investigated the patterns of contributions to the anti-ISIS coalition: While Haesebrouck (2016) concludes that the willingness to participate in air strikes was the result of interplay between alliance politics, threat perception, and domestic constraints, Saideman (2016) argues that the lessons of Afghanistan in combination with being victim of ISIS attacks provide the most important factors. A factor not considered by these integrated models, but which has gained increasing scholarly attention in recent studies of expeditionary operations is strategic culture (Becker, 2017;Biehl, Giegerich, & Jonas, 2013;Britz, 2016;Doeser, 2016aDoeser, , 2017Mirow, 2016;O'Connor & Vucetic, 2010). In contrast with most previous research on burden sharing, which is quantitative in nature, based on large-N approaches, this article examines burden sharing based on a qualitative research design.…”