Did they say it was a Civil War, an insurrection, or did they just call it a revolution?
Ontopic question:
Why is it even called a Revolution at all? Looking at the French Revolution it seems to me that a Revolution is about redistribution of power from a class perspective and/or changing the system of governance from the bottom up.
By this impression, the US independence war seems like little more than a Rebellion for the sake of autonomy to me. It certainly didnt champion Humanism like the French die, given that it was mostly a Rebellion by wealthy landowners, who in the End established a republic which was designed to expand and defend their privileges.
I've actually written a post to this exact question before. I'll link it here, along with a link to the rest of the thread which had some really good answers.
Edit: bot's telling me to cite myself and the others, so /u/DarthNetflix and /u/duck_sized_dick were pretty helpful.