The EEC is founded in 1957, having the members France, South Germany, Belgium, Luxembourg and Italy. After South German 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.