This book describes Japan's important role as an ally of Canada and Great Britain during World War One, and how Japan went from being a valued ally to a spurned partner and a potential adversary in the post-war world. In 1921 Canada persuaded the British Empire to end its long alliance with Japan - a decision that would ultimately be fraught with peril for the British Commonwealth in Asia and the Pacific as the world moved toward a second great conflict in the twentieth century.

This book brings together many leading experts who examine the different aspects of the Alliance in its different stages before, during and after the First World War, who explore the reasons for its success and for its end.

The Anglo-Japanese Alliance was the first formal agreement of its type reached by a Western 'great' power with a non-Caucasian nation in the modern era. As such, it represented an important milestone diplomatically, strategically and culturally. This book brings together many leading experts who examine the different aspects of the Alliance in its different stages before, during and after the First World War, who explore the reasons for its success and for its end, and who reach a number of interesting and innovative conclusions on the agreement's ultimate importance.