Man, I could give you examples for literal days. The history of the Mongols, by and large, was not written by the victorious Mongol Empire. The history of the Jews was not written by their occupiers and subjugators. The history of Norse conquerors were largely not written by the Norse. The history of unifying pagan Slavic kings was largely not written by pagan Slavs. The history of the Roman Emperor Augustus was not written by his partisans, despite his massive investment in propaganda and trimming ‘inconvenient’ narratives during his (highly successful) life.

History is written neither by winners nor losers; history is written by those who intend to write history. Smart rulers can get a head-start on this during their rule, but can never control it completely, and the longer they’ve passed, the more feeble their efforts at control become.

“I am Ozymandias, King of Kings…”