Germany's invasion of France in August 1914 represented a threat to the great power status of both Britain and France. The countries had no history of co-operation, yet the entente they had created in 1904 proceeded by trial and error, via recriminations, to win a war of unprecedented scale and ferocity. Elizabeth Greenhalgh examines the huge problem of finding a suitable command relationship in the field and in the two capitals. She details the civil-military relations on each side, the politic...