Q: The Thirteen Colonies were a group of British colonies on the east coast of North America founded in the 17th and 18th centuries that declared independence in 1776 and formed the United States of America. The Thirteen Colonies had very similar political, constitutional, and legal systems, and were dominated by Protestant English-speakers. They were part of Britain's possessions in the New World, which also included colonies in Canada and the Caribbean, as well as East and West Florida.

Answer this question: when did the colonies became the united states?
A: 1776
Explain how we arrive at this answer:
Explanation: The relevant information is: The Thirteen Colonies were a group of British colonies on the east coast of North America founded in the 17th and 18th centuries that declared independence in 1776 and formed the United States of America.