The United States, Britain and Germany started to research of the atomic bomb at the beginning of World War II. When Americans got it, the war in Europe was over and the bomb was only used against Japan.
Is it known what both sides wanted to do with the bomb if they had got it earlier? Bombing German and British cities? Destroying industrial complexes? Bombing concentrations of troops? Sinking whole navies?
If plans aren't known, or if they hadn't been made before developing the bomb, any scholar research on what would they have done with the bomb will be welcomed.