Performance in a military setting is influenced more by the quality of human resources than by the amount of weapons or technology, usually described as military morale. This article aims to analyse the psychometric properties of the Estonian version of the six-item instrument referring to respondents’ motivation and enthusiasm for accomplishing mission objectives. Confirmatory Factor Analysis, examining data from the Estonian Defence Forces (EDF), indicated that the six-item instrument functioned well at the individual level and was therefore recommended as a research and screening tool for the EDF.