The younger Star Wars fans should be familiar with the TV show Clone Wars. This series first introduced the world to Ahsoka Tano. We also got a look at Ahsoka in The Mandalorian, played by the lovely Rosario Dawson. She’ll also play her in her own upcoming TV series in Disney+.
Anyway, George Lucas implemented a bit of foreshadowing in Episode IV while Luke and Obi-Wan were deep in conversation. People were probably a bit confused as to what war they were referring to. Nobody, not even George, could have guessed just how important this throwaway line would become to the franchise.