How did the shattering war play out?

So the night of the black knives happens and Godwyn dies. What then? I’m talking, how long did Marika wait until she broke the Elden Ring? Were the demigods fighting for the great runes the next morning or? Then what battles happened when? That kind of thing. What’s the time line between Godwyn’s death and around when our tarnished starts of fuck butts.