No, they did not exist until July 1945. WW1 was over before 1920.
Nuclear weapons
Nuclear weapons
Nuclear weapons
Nuclear weapons
to use against Japan in world war II
Nuclear weapons were used against the enemy.
Nuclear weapons have only been used in anger in the Second World War (WW2) - they were used against the Japan to bring the war to an end.
No nuclear weapons have been used since World War 2. There were testings done by Russia and possibly other countries but they were never used against other nations.
fifth rank in nuclear weapons
If there are just enough nuclear weapons so yes they can destroy the World.
No. No nuclear weapons have ever been used in an act of war besides the two dropped on Japan during the Second World War. The United States and Russia both produced enormous amounts of nuclear weapons during the Cold War, though none were used.
Dropped on Japan to end the war.