The decline of British power in Asia, from a high point in 1905, when Britain's ally Japan vanquished the Russian Empire, apparently reducing the perceived threat that Russia posed to its influence in India and China, to the end of the twentieth century, when British power had dwindled to virtually nothing, is one of the most important themes in understanding the modern history of East and Southeast Asia. This book considers a range of issues that illustrate the significance and influence of the British Empire in Asia and the nature of Britain's imperial decline. Subjects covered include the challenges posed by Germany and Japan during the First World War, British efforts at international co-operation in the interwar period, the British relationship with Korea and Japan in the wake of the Second World War, and the complicated path of decolonisation in Southeast Asia and Hong Kong.