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Answer:
A. the Vietnam War
Explanation:
The domino theory was the basis for the United States strategy of containment, and the reason for the U.S. to enter the Vietnam War. The Vietnam War was a result of the national strategy of containment. The national strategy of containment demanded the U.S. stop communist aggression into the countries of Southeast Asia. This strategy was developed from a belief in the domino theory. The domino theory basically stated if one new country went communist in Asia then it would begin a chain reaction that would cause several more Southeast Asian countries becoming communist.
Answer:
After a number of victories, France became very important in continental Europe. Napoleon increased his power by making many alliances. He also made his friends and family members rule other European countries as French client states. The French invasion of Russia in 1812 became Napoleon's first big defeat. sorry if it's wrong.
The most important economic development in the mid-19th-century south was the cotton gin.