600s | dp2=610s | dp1=620s | d=630s | dn1=640s | dn2=650s | dn3=660s }} Events By Place Europe Khan Kubrat starts to rule in Great Bulgaria. Asia December - Abu Bakr defeats Mosailima in the Battle of Akraba. Queen Seondeok's crowned in Korea. Yazdgird III starts to rule in Persia. Ridda Wars begins By Topic Religion After the death of Muhammad, Abu Bakr becomes the first caliph and the Rashidun Caliphate (632-661)'s established. Births Deaths June 8 — Muhammad,… (More on 632)