Answer:
battle of the marne
Explanation:
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The Protestant Reformation is the answer.
"<span>The United States had a democratic system, and the Soviet Union
had a single-party system" would be the best option since the USSR was
communist.
</span>
The term that describes the concept of having three branches of power is : Separation of powers
This concept prevent the Government from becoming too powerful and untouchable by its own law
hope this helps