The concept of Western Allies is usually used to denote the major differences between the Western, democratic Allies and the communist, totalitarianSoviet Union.[1]: 3, 10, 114, 194 [3] The cooperation between individual Western Allies powers (such as exchange of military intelligence) was much more intensive than that between the Western Allies and the Soviet Union.[1]: 113–115 [4] That cooperation became more significant in later stages of the war (e.g. the Teheran Conference).[1]: 229 Nonetheless, the tensions remained high, with Western Allies and Soviet Union considering one another a threat, and drawing contingency plans for a war against one another (e.g. Operation Unthinkable, Plan Totality);[1]: 284, 289, 299, 317 [5]: 78 these tensions developed into the Cold War that lasted decades after the World War II ended.[1]: 2
^ abcdImlay, Talbot (2015), Maiolo, Joseph; Bosworth, Richard (eds.), "Western Allied ideology, 1939–1945", The Cambridge History of the Second World War: Volume 2: Politics and Ideology, The Cambridge History of the Second World War, vol. 2, Cambridge: Cambridge University Press, pp. 43–67, ISBN978-1-107-03407-5, retrieved 2025-01-11