This study utilizes strategic culture theory to examine the interwar German Naval High Command as a distinct subculture within the broader German security community. It investigates the impact of this subculture on a specific case of strategic behaviour – the 1940 invasion of Denmark and Norway: Operation Weserübung.The analysis suggests a reciprocal relationship between threat perception and geography and argues that ideational influence allowed a certain interpretation of the naval leaders’ historical experiences. Altogether, this shaped the strategic outlook of the naval high command leadership, and incrementally influenced the contextual understanding of the need to conduct an altering of Germanys strategic position.By applying a cultural lens from strategic studies onto a military historical case, this thesis contributes to both the theoretical and methodological advancement of War Studies. Furthermore, it offers exemplifying insights into the contextual shaping of strategic thought within a specific branch of an armed forces community.