DawnClan and DarkClan (Warriors Roleplay)

one of my biggest roleplays on my other account was TogetherClan. but before it was TogetherClan it was DawnClan and DarkClan.

since some of you might be new to this, DawnClan and DarkClan was a war started based on grudges. when we roleplayed it, is was during the war.. but what started the war? this roleplay will take place in the earlier days of DawnClan and DarkClan..