First paragraph refers to different weapons as it if were different names for the same thing. The merging-refactoring of
several articles was not very well done, needs work.
Since when is 1MT a very small nuclear bomb? Or is that a section yet to be written?
I think historically it is not big, while modern weapons usually operate in the 100-500KT range they have gone as high as 60MT. Hiroshima was 15KT and Nagasaki was 21KT but the first 'real' H-bomb (October 1952) yielded 10MT.