Where did the United States drop the atomic bomb?"

Hiroshima and Nagasaki

The United States dropped the first atomic bomb on the capital of Japan, Hiroshima. Three days later they dropped the second atomic bomb on another Japanese city called Nagasaki.

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explanation:

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.