History in the past is a really big blur that we are stuff trying to figure out. Even as far back to the prehistoric times. We try to figure out what really happened in the past simply by reading a book for just searching the internet concerning the specific topic. But we only know as much as what people have recorded down onto paper at the particular time. As this historical evidence gets passed down or is modified in a certain way it loses its authenticity. So we should make sure we use the latest sources there is.