The American Revolutionary War from 1775 to 1783 was not an isolated incident. Rather, the war was the first in a series of revolutions in Europe and the Americas that lasted into the mid-19th century.
The revolutions in the Americas were largely about breaking free from European colonial rule. In Haiti, where 90 percent of the population was enslaved on the eve of its revolution, the war for independence was specifically about abolishing slavery along with European colonial rule. In Europe, some of the revolutions concerned breaking away from larger empires. However, many, like the French Revolution, were internal movements that sought to overthrow monarchies.
There are many reasons why these revolutions happened, and most of them do not have to do with the United States. However, by being a prominent international example, the American Revolutionary War set the stage for other revolutions in the Atlantic World.