Impermanent alliances: cryptologic cooperation between the United States, Britain, and France on the Western Front, 1917-1918*

摘要

The extent of practical cooperation in the business of communications intelligence and communications security between the United States, France, and the United Kingdom on the Western Front has not been documented in depth. This paper will examine cryptologic cooperation between the three allies during the First World War, discuss why the relationships ended after that war, and argue that these impermanent alliances did not shape the cryptologic relationship between the U.S. and the UK that formed during the Second World War.