This history of Anglo-American efforts to overturn Ireland’s neutrality policy during the Second World War adds complexity to the grand narrative of the Western Alliance against the Axis Powers, exploring relatively unexamined emotional, personalised, and gendered politics that underlay policymaking and alliance relations. Friends and enemies combines the methodologies of diplomatic history through its close reliance on archival documentation with attention to new theoretical understandings regarding the roles played by personal friendships and enmities and competing masculine ideologies among national leaders. Including, Winston Churchill, Franklin Roosevelt and Eamon de Valera, and their close foreign policy advisers in London, Washington DC and Dublin, as they constructed national identities and defined their nations’ special relationships in time of war.