In 2016, supported by the European Defence Agency’s (EDA) Energy & Environment Working Group (EnE WG), EDA began collecting national defence-related energy data, aiming to gain a better overview and understanding of the types and volumes of energy resources used by European armed forces on an annual basis. In 2021, EDA enhanced the process by structuring the energy information, collection, and analysis, establishing a framework for monitoring participating Member States’ (pMS) defence energy data. A methodology was set for continuous monitoring, creating a dedicated web tool (webpage) for analysing and presenting the collected data, respectively. This factsheet presents the results obtained from the regional compilation and analysis of data from 2016 to 2020.