Charlemagne killed by some dude in single combat.
Here's the kicker, Charlemagne killed the dude who killed him. I want to imagine some sort of Shakespearian scene similar to Hamlet or something.
-Charlemagne gets stabbed-
C: Oh woe! Oh woe! Does my destiny end on this cold December day? Curse thee treacherous Greek, I shall drag you to the depths of hell myself!
-Charlemagne stabs Theophanes-
T: Merciful god, I too have been struck by the treachery of steel. As the great Carolus Magnus' destiny ends here, so too shall mine end here in this cold December field.
C: Theophanes, you have fought well as have I, but alas, we will never get the chance to fight once more.
T: A shame, a horrible shame, for I can see the glimmer of Rome in your eyes; a sign of hope in these dark times.
C: My eyes, they are failing, Theophanes, pray with me....
-Charlemagne dies-
T: Oh honourable Carolus Magnus, sleep well King of Franks.
-Theophanes dies-
-Random soldier walks out of nowhere in the middle of great fighting like he doesn't give a damn-
Soldier: And so the great tale of Karl has ended. A man loved by his mother, hated by his brother, and destined to bring the glimmer of Rome back to the eyes of Europa. Never shall Europa meet a man so great, as the great Carolus Magnus.