Strategic culture drives patterns of national statecraft, which in turn drive military strategy. Grand strategy also derives from strategic culture, which emerges from geographical, economic, and historical circumstances. A nation’s circumstances give rise to a distinctive manner of perceiving national power – including the use of military force. Strategic culture is ethnically and nationally driven, derived from a combination of factors. It may be national or subnational, and it may be based on real or imagined traits. It tends to be both enduring and unexamined. It involves intersectionality between national, subnational, and organizational cultures, and it may invoke fictive and contingent identities. It manifests in how individuals and organizations make sense of reality. Individuals and subgroups are presumed to self-ascribe to a certain identity, to absorb distinctive attitudes about force, and thus to adopt a “way of war.” Organizational and ethnic cultures coexist, and any military unit may have multiple subcultures. But strategic culture, since it derives from ethnic and national characteristics, precedes and supersedes organizational culture. Strategic culture influences the organizational culture of a national military, with ethnic and historical factors setting the parameters within which organizational culture and individual initiative operate. Ethnic culture frames strategic culture, which in turn interacts with organizational structure, institutional form, and individual incentives to create military organizational culture.