This article presents a concept of establishing a network of energy self-sufficient nodes in Slovenia and the EU, within the Defence RESilience Hub Network in Europe project initiated by the Ministry of Defence of Slovenia (MORS). The goal is to reduce the energy dependence of military facilities on external suppliers. A mathematical model of a military site’s micro-grid incorporates multiple energy vectors and their conversion and storage, with a focus on hydrogen technologies. A case study of a military site in Belgium shows that an energy system with solar and wind power can provide sufficient hydrogen for transportation needs and operate the site autonomously for up to 30 days. Additionally, the carbon footprint of the military base as an energy system was calculated, indicating potential reductions in environmental impacts.