History is an image a society wants to present to itself for its own benefit.
That is why the same event describe by the different protagonists will differ.
So every person involve in writing History wants his/her side seen as good, even if it wasn’t…

History taught in Classrooms is more construction of Identity with Role Model and Heroes than real history.
I have an English Colleague who can with a strait face tell me that England was never defeated. When I do answer that is why Philadelphia is still English, he just avoid answering