Answer: In a general sense, World War I and World War II were wars conducted on a massive scale unlike any other wars in history. They were similarly caused by nationalism, imperialism, alliances, and militarism. Both wars saw countries trying to upset the power balance in Europe for their own gain.
Explanation:
Answer: Ask your teacher if you don’t understand
Answer:
by the United States during World War II.
Explanation:
The first nuclear weapons to be used against another nation were dropped by "the United States during World War II."
This is evident in the fact that during world war 2, the United States B-29 bomber plane otherwise known as the Enola Gay in August 1945, dropped its first nuclear bomb over the city of Hiroshima, Japan.
The nuclear bomb led to the death of about 140,000 people in the city.