ABSTRACT
This chapter discusses the methodology by presenting a genealogy of the links between geography and defence studies and show how intertwined geography and military issues have been for a long time. The geographical perspective on war, defence issues has nevertheless evolved with the development of a critical school in geography and geopolitics. Geostrategy would be both the study of how geographical data determine the “social bonds” that found the nation, but also, in a more military sense, the study of the influence of geography on the use of organized forces at the national level. While the critical approach invites the researcher to deconstruct the social and political dimensions of geographical space, geospatial intelligence, on the contrary, seems to lead military geography into a technological mutation that produces and processes data without ever questioning them. At the beginning of the 20th century, geopolitics emerged and aimed at discerning the geographical foundations of power on the international scene.
