[Answer] What is the longest war in American history?

Step 1 : Introduction to the question "What is the longest war in American history?"

...The War in Afghanistan is the longest war in American history, outlasting the Civil War, Spanish-American War, World War I, World War II, and Korean War combined. The Afghanistan War began in October 2001, and was triggered by the September 11 attacks. The nearly 18-year war, once known as Operation Enduring Freedom but now called Resolute Support, has led to the deaths of over 2,400 American soldiers, along with thousands of Taliban and Al Qaeda fighters — as well as thousands of Afghan civilians.

Step 2 : Answer to the question "What is the longest war in American history?"

Afghanistan War:

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