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Answer: Because they put cheese!
In 1883, the major railroad companies divided the nation into the for time zones still used today.
You didn't provide the answers, however, European Communist countries didn't have much choice since they were liberated by Communists during the war. The Asian countries did have a choice and chose to adopt it which is why there were many wars, both civil and one country fighting another like in Vietnam or Korea. They were supported by the Soviets and China.
For Germany the treat of Versailles dealt them a heavy hand. They were imposed land, economic and military restraints as well as forced to pay a great deal of the reparations cost for countries like France. Whom during world war one had received heavy damages.
More specific on territory, Germany's land were split between different nations. Such as the Rhineland which they were prohibited from occupying after losing the war.
Hope it somewhat helps :)