The Wat in Iraq cost the United States approximately D) $1 trillion.
Exact is $1.7 trillion. Plus some $490 billion owed to conflict ex-soldiers
Answer:
The Korean War
The Korean War (1950-1953) began when the North Korean Communist army crossed the 38th Parallel and invaded non-Communist South Korea.
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-RosemaryAndStars
What other purposes did it serve? To protect China from the Mongols (wandering nomads) from taking over their territory. It served other purposes such as an elevated road way, a warning and communication system, safeguarding trading routes, and as a trade market for different cultures.
Your answer would be an economic community