Well? It's more that history is written by survivors.
If you want to go this route, history is literally written by literate people/scribe, then they get published, so people can read and judge/study it.
Who you think the one letting the publisher do it?
I won't touch on the fan fiction written by survivors whose words start with IF ONLY or BELIEVE ME or I WAS THERE WHERE EVERYONE DIED, who, most of the time, are people writing from PTSD without a concrete proof, war stories from false/personal biased story/just want to boast about being a war "hero".
Not really... Like the other person said to your comment. History is written by the survivors. Just look at WW2 and all the bulshit that was told by the German command that survived. Till this day people believe that the German military was so modern and mechanized, and in reality most was not. Or that they did nothing wrong. All of the problems and why they lost was hitler and the other people that died and they were amazing.
Sure a part of it is writen by the victors but a LOT of it is just made up by other people to make them look better.
Yet the germans invincible tech got nuked, so much for being modern and mechanized and said to be amazing when nuke is all it takes to end the useless massacre.
Not sure how much you love history or you were just WW2 fanatics or simply hitler simps and refuse to accept historical facts, from how german losing was something that was not entirely fall on hitler capabilities, but many more factors.
Plus you aren't counting the other wars? Napoleon wars, japan wars, china wars, vietnam wars, or the various modern wars are a joke to you?
I rest my case, I do not want to be a heartless man who speaks too much for those affected from war, whoever they be.