How did the declaration of independence change the nature of the american revolution

They were no longer for fairer treatment but now for a new nation.

Explanation: Hope this helps :)

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.