668

丁卯年 (Fire Rabbit)
3365 or 3158
— to —
戊辰年 (Earth Dragon)
3366 or 3159

阴火兔年
(female Fire-Rabbit)
794 or 413 or −359
— to —
阳土龙年
(male Earth-Dragon)
795 or 414 or −358

July 15 – Emperor Constans II is killed under mysterious circumstances in his bath, during a mutinyatSyracuse. The Byzantine court returns to Constantinople after an absence of 5 years, in which the Muslim-Arabs have made annual invasions and devastations of Anatolia. Probably assassinated by his chamberlain after a 27-year reign, Constans is succeeded by his son Constantine IV (the "Bearded"), alongside his brothers Heraclius and Tiberius as co-emperors.
Mezezius, Byzantine general and patrikios ("first patrician"), is proclaimed emperor by the army in Syracuse. Constantine IV organizes an expedition to suppress the military revolt in Sicily.

Ebroin, mayor of the palace, becomes de facto ruler of Neustria and (in theory) "of the Franks". According to Bede, he runs the nation's foreign policy and internal security.
Kotrag, ruler (khagan) of Great Bulgaria, leads the Khazars in overthrowing his brother Batbayan of the Onogurs, and moves south into the Carpathian Mountains.
Asparukh, leader of the Utigurs, leaves the Ongal area to Kotrag, and leads his people into MoesiainNorthern Bulgaria (approximate date).

Caliph Muawiyah I receives an invitation from Saborios, Byzantine commander of the troops in Armenia, to help overthrow Constantine IV in Constantinople.^[1] He sends a Muslim army under his son Yazid, against the Byzantine Empire.
Yazid reaches ChalcedoninBithynia, and takes the important Byzantine center Amorium (modern Turkey).^[2]
Arab forces conquer the Garamantes in the Sahara desert (Libya).

Chinese troops sent by the Tang dynasty emperor Gao Zong complete their expedition in the Korean Peninsula. Leaders of the expedition have been selected by the emperor's powerful concubine Wu Zetian. The kingdom of Goguryeo is overthrown; the Unified Silla period starts.
Emperor TenjiofJapan officially accedes to the throne, and hunts on the Moor of Ōmi-Gamōno. The letters exchanged between prince Ōama and princess Nukata are recorded in Man'yōshū.
The monk Gyōki, one of the founders of Japanese Buddhism, is born in the Ōtori District of Kawachi Province.^[3]

Theodore of Tarsus is made archbishop of Canterbury. He introduces a strict Roman parochial system that becomes the model for the secular state.
Colman of Lindisfarne, accompanied by 30 disciples, sails for Ireland, settling down at Inishbofin and founds a monastery.^[4]

Events