<span>Answer: the line dividing democratic and communist countries in Europe. The term was used to name the ideological, political and sometimes physical borders between Western (Democratic) nations in Europe and Eastern (communist) nations in Europe, after the II World War. </span>
In an effort to preserve the balance of power in Congress between slave and free states, the Missouri compromise was passed in 1820 admitting Missouri as a slave state and Maine as a free state.
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