How did the atomic bombings of hiroshima and nagasaki illustrate the idea that world war ii was a "total war"?

The Japanese brought us into the war that at the time only involved European counties and their colonies. This created the world war because it now involved other continents. By the U.S. bombing and ending the war, the U.S. was shown to be a super power, shifting the balance of power to the west

Most of the people killed by the atomic bombs were not members of the military.