Editing 657 (section)

=== By place ===
==== Europe ====
* [[Grimoald the Elder]], mayor of the palace of [[Austrasia]], is deposed by [[Clovis II]], king of [[Neustria]]. Clovis also captures Grimoald's son [[Childebert the Adopted]], executing them both. 
* Clovis II dies and is succeeded by his eldest son [[Chlothar III]], age 5, who becomes king of Neustria and [[Kingdom of Burgundy|Burgundy]], under the [[regency]] of his mother [[Balthild]].

==== Arab Empire ====
* [[Battle of Siffin]]: Muslim forces under [[Ali|Ali ibn Abi-Talib]] fight an inconclusive battle against [[Mu'awiya I]], on the banks of the [[Euphrates]], near [[Raqqa]] ([[Syria]]).

==== Asia ====
* [[Tang campaigns against the Western Turks]]: Emperor [[Emperor Gaozong of Tang|Gao Zong]] dispatches a [[Conquest of the Western Turks|military campaign]] led by [[Su Dingfang]]. He annexes the [[Western Turkic Khaganate]].
* Gao Zong commissions the [[pharmacology]] publication of an official [[materia medica]], documenting the use of 833 different substances for [[Medicine|medicinal]] purposes.

==== Americas ====
* In the course of the [[Second Tikal–Calakmul War]], the [[Snake Lord]] (Yuknoom Ch'een II) makes a direct attack against [[Tikal]] itself, driving out its new ruler [[Nuun Ujol Chaak]], and establishing [[Calakmul]] as the [[regional superpower]]. [[Bʼalaj Chan Kʼawiil]], the one time [[heir apparent]] to rule Tikal, swears his allegiance to the new overlord.