People have fought with each other since the 'dawn of' history/time/civilization.
She drove 'from dawn to/until dusk'. [=from early morning until early evening]
The solution finally 'dawned on' him. [=he finally saw the solution]
(..) Never better! I feel like I can spit fire! Have you seen Luna up here? Luna? I'm mad for her. I think it's about time I told her since we'll probably both be dead by dawn. I know. Bloody hell! We'll never find him on this. Here he is! - Just now... (..)2011 Harry Potter and the Deathly Hallows: Part 2