Based on a wide range of primary sources, this book shows the way in which diplomacy, economics, finance and strategy became intertwined during the First World War. The author examines the diplomatic, economic, financial and military relations between Britain and Russia and argues that the key to understanding the alliance is the British determination to win the war and the role Russia played in achieving this aim. British strategy is shown to be more the result of her relations with her allies, especially during the first years of the war, than a quarrel between East and West. This revision of the accepted interpretation of the strategy leads to a reassessment of the views of Lloyd George, Kitchener and Grey. The author concludes that in 1917 the British interest in Russia remained as it was earlier in the war: the maintenance of a powerful ally on the eastern front.