Zenan Bridge (Defense in Lavos Timeline)

Inquiry

Zenan Bridge was held by Crono in the Keystone Timelines, and it was suggested that the knights of the Kingdom of Guardia could not defend the bridge themselves. It is also implied that Zenan Bridge is a last point of defense for the kingdom, meaning that had it fallen, the Mystics would have won the Mystic War. If Crono was essential to its defense, and the world remained the same before and after his intervention in time, how was Zenan Bridge guarded in the Lavos Timeline?

Theories

Frog-Retainer Theory

ZeaLitY

Frog mentions that he failed to save the Queen from being kidnapped in the Keystone Timelines, and departs for the Cursed Woods. I propose that due to the different nature of her rescue in the Lavos Timeline, Frog stayed with the kingdom, and was able to fill Crono's role in the defense of Zenan Bridge.

Support

ZeaLitY: Perhaps Crono's role in saving Queen Leene in the Keystone Timelines made Frog feel more inferior and responsible than he would if he alone had saved her from Yakra.