It was the unification of diverse groups since they had common ground to unite
Horseless carriages, aka cars.
the answer is Germany, Italy and Japan
In the 1972 Olympics, Mark Spitz won 7 gold medals for 100m Butterfly, 100m Freestyle, 200m Butterfly, 200m Freestyle, 4×100m Freestyle Relay, 4×100m Medley Relay, and 4×200m Freestyle Relay.
Poland
Poland refused to give Hitler access to Danzig because fear of invasion. Danzig is today referred to as Gdansk and is in Poland. The Polish Corridor separated Germany from East Prussia. Hitler assumed that the British and Americans would not intervene