This paper explores the concept of 'Performing Body on Stage' based on the choreographic work Glory which considers the critical point of view on system and body in relation to Korean sociocultural context. Glory focuses on the physical experience of Korean male dancers, experiencing the military service and dance competitions, questions the system recreated in the body, and asks "is the body free in dance?" To shape this into work, the dancer’s reflective testimonies are used as the materials of choreography, and the conceptualized and contextualized structure is developed into the form of ‘choreographic documentary’. In this paper, I refer Judith Butler’s proposal on ‘vulnerability and resistance’ to construct the frame of this study. I analyze the choreographic approach to the dancer’s body and how a ‘vulnerable body’ can be transformed into a ‘political subject’ through the choreographer’s practice in Glory. When the apparatus which are invisible but attached to the body are visualized on stage, the body exposes the social and political form. In this sense, finding the index of precarity associated with physical vulnerability was not only the process of choreography but also becoming subject in this work. Having physical autonomy in dance is that one actualizes the potential of artistic creation latent in individual diversity, not the military body identity, which moves in an interminable manner with the same identity. This artistic act of the choreographer is political as well as aesthetic in terms of re-asking about the nature of the dance and contemporary arts at the same time.