What motivational factor played a key role in the issuance of the monroe doctrine?

The United States wanted to make sure that the European countries will not attack the United States. The doctrine stated that the US will remain neutral in any foreign affairs. If any European countries will try to colonize the US, they will consider it as an attack and may declare war against the country involved.

soviet influence spread across eastern europe sharply during and after wwii. the soviet armies liberated the countries in eastern europe and occupied them from the germans as they were forced to retreat towards germany.

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