How did napoleon use snowball as a scapegoat?
When Napoleon exiled Snowball, this gave him the opportunity to blame all the wrongs of animal farm on him. For example, the windmills destruction was blamed on snowball, but the odds of that are very slim because it was his idea to build it in the first place. During the first battle, Napoleon convinced all of the other animals into thinking that it was snowball who led the human forces against the animals, even though it was very much the other way around.