This thesis will argue that cultural disparity between Germany and Italy played a significant role in creating and exacerbating problems within the Italo-German military alliance in the Second World War. This will be achieved by first comparing and contrasting trends in Italian and German military culture and broader martial culture throughout the nineteenth and early twentieth century. These trends will then be applied to Italo-German attempts at military cooperation in the North African, Mediterranean, Atlantic, and Eastern theatres of the Second World War. Memoirs will be used extensively to determine what attitudes were between personnel in the Italian and German militaries. What will be found is that military cooperation between these two powers was made ineffective by cultural disparity.