Ambivalent Albion, Ambitious Ally: Britain's Decision for No Separate Peace in 1914

Abstract

When Britain entered the First World War it did so as an especially hesitant belligerent. One month later, the British enthusiastically signed the Treaty of London, stating that the Entente powers would prosecute the war in common and that none would pursue a separate peace. Why would a state long known for jealously guarding its ability to maintain a free hand initiate a binding alliance that restricted its war termination prospects after one month of combat? And what were the effects of its decision to do so? Answering this question requires not only that we examine British decision making but that we understand No Separate Peace Agreements and why states sign them. I hypothesize that a state will initiate a No Separate Peace Agreement when it has reason to fear that one of its cobelligerents may defect. I also hypothesize that No Separate Peace Agreements will cause states to reconcile war aims with their allies, agreeing to different terms of peace than might have been necessary to satisfy any one of them individually. Using new archival documents, I analyze a case study of British decision making in the early weeks of World War I and find substantial support for the hypotheses.