Editing 684 (section)

=== By place ===

==== Europe ====
* [[Gistemar|Ghislemar]], mayor of the palace in [[Neustria]] and [[Kingdom of Burgundy|Burgundy]], dies after a 2-year reign, and is succeeded by his father [[Waratto]]. He makes peace between the three [[Francia|Frankish kingdoms]].

==== Britain ====
* King [[Ecgfrith of Northumbria]] sends a [[punitive expedition]] to Ireland under his [[ealdorman]] Berht, laying waste to the territory of [[Kingdom of Meath|Meath]], ruled by High King [[Fínsnechta Fledach]].<ref>[[Bede]], ''[[Historia ecclesiastica gentis Anglorum]]''.{{full citation needed|date=September 2021}}</ref>

==== Arabian Empire ====
* Caliph [[Mu'awiya II]] dies at [[Damascus]], after a brief reign that ends [[Umayyad Caliphate#Sufyanids|Sufyanid rule]]. A new [[caliph]] is proclaimed in [[Syria]] amidst [[Endemic warfare|tribal wars]], but [[Marwan I]] will reign until next year.
* [[August 18]] &ndash; [[Battle of Marj Rahit (684)|Battle of Marj Rahit]]: Muslim [[Partisan (military)|partisan]]s under Marwan I defeat the supporters of [[Abd Allah ibn al-Zubayr]] near Damascus, and cement [[Umayyad Caliphate|Umayyad]] control of Syria.

==== Asia ====
* [[January 3]] &ndash; [[Emperor Zhongzong of Tang|Zhong Zong]] succeeds his father [[Emperor Gaozong of Tang|Gao Zong]], and becomes emperor of the [[Tang dynasty]]. His mother [[Wu Zetian]] remains the [[power behind the throne]] in China.
* [[February 27]] &ndash; Wu Zetian replaces Zhong Zong in favor of his younger brother [[Emperor Ruizong of Tang|Rui Zong]]. He becomes a [[puppet ruler]], and Zhong Zong is placed under [[house arrest]]. 
* Summer &ndash; The [[Pallava dynasty|Pallava Empire]] (modern India) invades the kingdom of [[Sri Lanka|Ceylon]]. A Pallavan naval expedition employing [[Tamils|Tamil]] mercenaries ends the [[List of Sri Lankan monarchs#House of Moriya (463–691)|Moriya dynasty]].

=====Japan=====
* [[September 7]] &ndash; A large [[comet]] is observed in Japan (it's Japan's oldest observation record of [[Halley's Comet]]).
* [[November 13]] &ndash; Emperor [[Emperor Tenmu|Tenmu]] institutes eight titles of eight classes (''[[Kabane|Yakusa-no-kabane]]'') in Japan.
* [[November 26]] &ndash; [[684 Hakuho earthquake]]. A great [[earthquake]] strikes Japan. The people, houses, [[Buddhist temples in Japan|temples]], [[Shinto shrine|shrines]] and domestic animals are greatly damaged.

==== Mesoamerica ====
* [[February 10]] &ndash; [[Kʼinich Kan Bahlam II]] accedes to the rulership of the [[Maya civilization|Maya]] polity of [[Palenque]] (modern Mexico).