As a part of the overarching publication “Willingness to Defend Own Country in the Baltic States: Implications for National Security and NATO’s Collective Defence” (2021), the author of this chapter assesses willingness to defend Estonia. The author puts forth several points. While such factors as historical experience, i.e., the Soviet occupation and visibility of NATO Allies, are shared with both Latvia and Lithuania, other reasons are more Estonia-specific. Among these are the effective integration of military and civilian sector, i.e., a mature conscription system, operational reservists’ system, and effective military-civilian communication. Another positive factor is the Nordic, or more specifically Finnish, influence on the Estonian military culture, as well as the governance approach and lifestyle in broader terms. Nevertheless, a notable issue remains – level of willingness is lower among non-Estonians, i.e., Russian speakers.