Your challenge, with a POD after 1920, is for the world to be locked in a three-way "cold war". Bonus points if you manage to create such a "three-way cold war" with a POD after 1945 and/or the "third bloc" isn't a right-wing nationalist/fascist bloc. What would the dynamics and geopolitics of such a world be like and how powerful would such a "third bloc" be?