Answer:
It came from the culmination of historical and political factors during the process of declaring independence and forming a new nation.
Step-by-step explanation:
The name "United States" was used in the Declaration of Independence, which was adopted by the Continental Congress on July 4, 1776. The Declaration stated that the thirteen American colonies were now separate and independent states, no longer under the rule of Great Britain. The term "United States" indicated the collective unity of these states as they stood together in their pursuit of independence.
The phrase "United States of America" was later used in the Articles of Confederation, which served as the first constitution of the newly formed nation. The Articles of Confederation were adopted in 1777 and ratified in 1781. This document formally referred to the new nation as the "United States of America."
So, the name "United States of America" originated from the phrasing used in both the Declaration of Independence and the Articles of Confederation, reflecting the idea of separate states coming together in unity to form a new nation on the North American continent.