The Caliph during the Battle of Karbala in 680 CE was Yazid I, the second Umayyad Caliph.
Yazid I was the son of Muawiyah I, the founder of the Umayyad Caliphate. After Muawiyahâs death, Yazid I was chosen as his successor, despite facing opposition from some Muslims who believed that the caliphate should be elected, not inherited.
The Battle of Karbala itself was a pivotal event in Islamic history, marked by the martyrdom of Hussain ibn Ali, the grandson of Prophet Muhammad, and his companions. The battle occurred after Yazid I demanded allegiance from Hussain, who refused due to his belief that Yazid's rule was illegitimate.
The tragic events at Karbala had a profound impact on Islamic history, particularly for the Shia Muslims, who view Hussain as a martyr and his death as a symbol of oppression and injustice.