Style in the army discourse, including the Nigerian Army parade interaction, is strictly deployed through various linguistic and non linguistic resources. Yet, existing studies on language and style have been predominantly applied to religious, political, legal discourse and so on, neglecting the Nigerian Army parade interaction. This study, therefore, investigated the language and style in the Nigerian Army parade interaction. This is with a view to determining the relationship between the style deployed by the Nigerian soldiers during parade and the linguistic and non linguistic resources marking the style. The study adopted Halliday’s Systemic Functional Grammar as theory, with the data collected through purposive audio recordings, and video clips of army interactions during parades at 2 Division Nigerian Army, Ibadan. Participant observations of many parade activities of soldiers were also conducted, with the data subjected to stylistic analysis. One main style, namely, the authoritative style, was deployed by soldiers of the Nigerian Army during parade, as shown in the data. This style was enacted through the utilization of intonation cues, lexical repetition/reiteration, lexical collocation, which constitute the linguistic resources; sound signals (instrument and human based sound) and action oriented body language that mark the non linguistic resources. Thus, there is a close link between the style deployed by soldiers of the Nigerian Army in parade interaction, and the linguistic and non linguistic resources that project it, the understanding of which ultimately facilitate the interpretation of army-based parade interaction in Nigeria.