America
They used nuclear and atomic bombs.
Hydrogen bombs use the same process of nuclear fusionthat powers the Sun.
Nuclear bombs can use either nuclear fission or nuclear fusion as the primary mechanism of energy release. Most nuclear bombs in current arsenals rely on nuclear fission reactions, while thermonuclear bombs use a fission reaction to trigger a fusion reaction.
The first use of nuclear energy before electricity was in the form of nuclear weapons, such as the atomic bombs dropped on Hiroshima and Nagasaki during World War II in 1945.
Generally, the people have no control over nuclear bombs. That they exist is a fact of life. If your country has them it is part of your duty to ensure your leaders use them, or not, in a manner that is ethical and moral for your society.
The U.S. use nuclear bombs during World War ll to bomb Hiroshima and Nagasaki after Japan refused to surrender.
In World War 2 the Nuclear bombs were Uranium and Plutonium. Nowadays they use Hydrogen.
The United States was the first country to use nuclear power for electricity generation, with the first nuclear power plant going online in 1957 in Shippingport, Pennsylvania.
US
The only country to ever use nuclear weapons in war is the United States with the two bombs they dropped on Japan. No other country has ever actually used a nuclear weapon.
I believe no one should use nuclear weapons.
Japan