A Map of Europe, circa 1953.
The POD is that D-Day ends in a disaster for the Allies, thus allowing the Soviet Union to conquer most of Mainland Europe with the exception of Norway, Sweden, the Iberian Peninsula, Turkey, and Southern Greece. NATO would be formed in 1948 with Britain, Italy, Norway, Canada, the United States, Turkey, and the French Government-in-Exile in Algeria as it's founding members. At this time the Soviet Union would form the Warsaw Pact with much of it's puppets in Europe (except for Germany, Finland, and Yugoslavia) as it's members. In the Middle East, the success of the Israeli War of Independence and the massive Soviet support would Israel becoming a Communist State, thus the Arab would ally itself with the West. In 1950, War would break out in Greece between the North and the South, with the Northern Regime being given Soviet aid while NATO came to the assistance of the Southern Government. By 1953, due to a stalemate in the war, a cease fire was brokered and an armistice is signed. Sweden through not a NATO member, would find itself increasingly siding with the West due to Soviet encroachments on her territory.