How do the pigs rewrite history in Animal Farm?

I think
that one way the Pigs rewrite history is to ensure that they are always in the position of
power.  This job falls largely to , who is able to spin anything so that the Pigs, and in
particular , is always in the right.  The pigs rewrite history by being able to stretch the
truth so that the animals, unassuming of the ulterior motives, end up believing that which is
said by Squealer and the pigs.  An example of this would be when the Pigs move into the house
and while it might on face value violate a tenet of Animalism, Squealer argues that it is needed
for the Pigs to have space in order to work and do the planning for the farm's benefit.  This is
an example of rewriting history, or Animalism, in order to benefit the pigs while the other
animals fail to either recognize or act on what is being done.  In , Squealer rewrites history
in constructingas an agent of Jones, and thereby opening the door to anyone who agreed with him
as an enemy of the farm.  Snowball was instrumental to the farm's success, but once deemed an
adversary by Napoleon, Squealer embraces the task of rewriting the narrative as Snowball being
an enemy of the farm and ensuring that anyone who supported him is treated to the ultimate
penalty in death.  It is in this scene where theshows how much authority benefits when it is
able to rewrite and construct history in a manner that legitimizes its own
authority.