This article explores the defense transformation processes during the two initial decades of the twenty-first century among the 11 former communist states that currently are members of both the European Union (EU) and North Atlantic Treaty Organization (NATO). The article introduces an analytical framework for systematic comparisons of states’ priorities regarding military strategy. Moreover, the article evaluates the influence of two intervening variables: (i) differences in relative power between middle powers and small states and (ii) differences in geographical exposure. Our findings suggest that differences related to these intervening variables correlate with differences in prioritized strategic ends, means, and ways.