Answer:
Declaring war and maintaining a military
Step-by-step explanation:
In Article I, Section 8, Clause 1 of the US Constitution determines that the Congress has the expressed power to provide for the common Defense and general welfare of the US and the power to declare war. When the framers gave Congress the power to declare war was a revolutionary decision because it was different from the European powers which the monarchs controlled if the country would go into war or not. Giving the power to declare war to Congress means that the people have the power to declare war.