A more aggressive Soviet Union (Finland and Poland being the westernmost SSRs) forces Western European nations to unite against their common foe, communism. At the beginning it could easiest be described as a French-ruled almost fascist kind of state, which later expanded and grew to become a beacon of unity and prosperity across ethnical borders. Although the capital remains in Paris and the lingua franca of the Federation is French, citizens of every ethnicity enjoys the same freedom. Notice the separation of Alsace-Lorraine on map #2, a desicion that was made after unsuccessfull attempts at Frenchifying Alsace, and the cession of the Dunkirk area to Flanders. West Berlin is still a city split in two, and just as IOTL West Berlin serves no administrative role, whereas the eastern counterpart is the capital of the Soviet puppet regime in Germany.
What looks to be a unified Germany on map #1 is, per OTL, an occupied state without a central authority, shown the way it is for simplicity.
Finished on December 15, 2011