alternatehistory.com

Supranational organizations

(I don't want to develop the full post-war history, so only a sketch.)

The Marshall plan (since 1947) also helps the Eastern European nations ITTL (except Finland, which the Soviet Union forbids, and for a while East Germany).

In 1949, the NATO is founded to deter the Soviet Union. At the beginning it's made of the same states as OTL; after waiting a few months, the Eastern European states including the Baltic states (despite Soviet protests) join too. Greece and Turkey join in 1952, and in 1955 even South Germany.

The EEC is founded in 1957, having the members France, South Germany, Belgium, Luxembourg and Italy. After SG chancellor Figl and Austrian chancellor Raab negotiate, it's extended in 1963 to Poland, Czechoslovakia, Hungary and Yugoslavia.

Great Britain founds the EFTA as a counterpart in 1960, consisting of the Scandinavian states, GB, West Germany, the Netherlands, Switzerland and Portugal. When the EEC extends, the EFTA in return lets the Baltic states join in 1966.

East Germany doesn't trust capitalist organizations and thus keeps out, like Finland mostly trading with the Soviet Union (under better conditions than OTL, however); fascist Spain isn't welcome in either organization; and the other states in SE Europe are considered to be too backwards. The EEC makes associational treaties with Greece, Turkey, Romania, Albania and Bulgaria, though.