Answer :
The war fought by U.S. are War of 1812,Mexican war, civil war. The war not fought by U.S is the Korean war.
What were the wars Fought by the United States in 1800s?
The war fought by the United Nations are the War of 1812, the Mexican-American War, the Civil War, and the Spanish-American War.
The wars was not fought by the United States in the 1800s was the korean war as it was battled between North Korea and South Korea from 1950 to 1953.
Therefore, option b aplty expalin the was not fought by the U.S.
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