Yes. East Germany was separated from West Germany by the Berlin Wall during the era of communism there. East Germany was part of the Soviet Communist Bloc and West Germany was the non-communist portion.
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East was ruled by communist russia while west was ruled by the allies (america, france and Britain), Berlin was in the eastern side but it was also split up like the whole of Germany was, into four sectors, each one ruled by the corresponding ally.
There were two manor conflicts in East Asia which were part of the Cold War, those being the Korean War, and the Vietnam War. Korea remains divided into North and South Korea to this day, but Vietnam became a unified communist nation (and remains one of the last communist nations on Earth). Other than that, various Cold War alliances affected all the politics of the region.
A figurative iron curtain divided Europe into the Democratic West and Communist East. It cut Germany clean in half. Europe was constantly on its toes, each fearing the other side would strike either on them or at America, catching them in the middle.
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It was called the Domino Theory. This theory said, if a country becomes communist all its neighbors will eventually fall to communism like dominoes. The reality is, countries don't become communist unless they're forced to. People like owning things. They like being able to go to the store and buy bananas if they want. And it's hard to do those things in a country where the state owns everything and foods are rationed.