The American Revolution was revolutionary due to the independent of the 13 colonies. The British crown no longer ruled the colonies.
The 13 colonies had transformed into their own nation - the United States of America.
One major note, however, is that, unlike in the French Revolution, the social order remained the same.
We recently covered this in my Advanced Placement World History class. If you need any extra information, just comment on this answer and I will get back to you as soon as possible.
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