Which Allied nation dropped the atomic bomb on Japan in 1945?

In 1945, the United States dropped two atomic bombs on Japan, ending World War II.

Explanation hope that 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.