As tensions rose, British troops retreated from Boston to Fort William. Paul Revere encouraged anti-British attitudes by etching a now-famous engraving depicting British soldiers callously murdering American colonists.
America was supposed to be part of Britain, but when the soldiers kill the people, it made them think that they were separated from Britain. It made the people loathed the British people, and it showed them that they didn't have many rights, since all they were doing was protesting.
The United States became an imperialist nation at the end of the 19th century because Americans wanted to expand overseas with their belief in manifest destiny.
I would say treason because the 13 colonies were still colonies of Great Britain who had authority over the colonies and it was not in their interests to have the colonies become independent at all from Britain,.