Answer:
the Boston Tea Party happened as a result of “taxation without representation”, yet the cause is more complex than that. The American colonists believed Britain was unfairly taxing them to pay for expenses incurred during the French and Indian War.
Explanation:
Personally, I would say Vietnam. This is because the war in Vietnam started in 1955, escalated even more when the U.S. came in the 60s, and finally came to a close in 1975. Vietnam has fought for independence for 20 years, and that's my reason why.