The 13 US colonies are British property and governed by the king but are used handle stuff on their own.
Britain and France go to War for land and Britain wins, but the colonies are not allowed to move into the new land. And this makes them angry.
Say bye to your self-government MA.
After the winning, England needed money to pay off the War debt, so they made new taxes for the colonists. But they didn't find it quite fair because they had no say in the government no "representation"
We are FREE.
England keeps the colonies from buying non-British tea and they are angry, so they dump tons of British tea in the ocean as a protest.
Due to the Boston tea party, the British take away Massachusetts government and close Boston's port. These are called the intolerable acts.
The colonies are tired of the way England treats them so the 13 leaders of the colonies get together and write a document to break up with the British. DECLARATION OF INDEPENDENCE.