This article contributes to the literature theorizing military social order, embodiment, and resistance in IR. The military institution is known to resist change, and much research have been devoted to challenges to the gendered order of the military. One area that has received little attention, however, is the reluctance of many militaries in the West to facilitate veganism during service in spite of the increasing demand for vegan food options, diversity, and sustainability. Drawing on research on the military social order and gender theory, I conduct an unpacking of conflicting elements and representations of military and vegan bodies, and theorize this reluctance as institutional resistance. Typically, the military does not offer motivations for its stance – which makes it difficult to detect and counter. As a consequence, vegans are silenced and excluded, not facilitated to enter the military. This is a challenge to increasing attempts at governing sustainability and diversity in the military.