History is, to put it basically, any event that occurred in the past. Technically speaking, history can be as early as yesterday since it's in the past (though honestly most people would probably consider that current events), or as far back as ten thousand years ago. History is usually thought of as more specifically focused on past events of key importance; for example, it's pretty likely that nobody would care what a King had for breakfast a couple hundred years ago, but they
would care about the outcome of one of his wars. We also usually only consider things that we know actually happened as true history- if there's no historical record of an event occurring, then it cannot be called history, because we do not know for certain if it actually occurred.
Fiction, meanwhile, is a record of often made-up or at least highly embellished events or people, created for the purpose of entertainment. For example, consider the stories of King Arthur. While it is possible that some of it is based in historical account, most of it is likely fictionalized legend. Was there actually a King Arthur? Probably not, but he could have been based loosely on someone. Likewise, things like dragons never existed.
SOURCES:
Dictionary.com
Wikipedia.org
https://www.thoughtco.com/what-is-history-collection-of-definitions-171282
Clearly this is the ‘exciting’ adaptation we deserve.