Editing 839 (section)

== Events ==
<onlyinclude>

=== By place ===
==== Europe ====
* Prince [[Sicard of Benevento]] is assassinated by a conspiracy among the [[nobility]]. He is succeeded by [[Radelchis I of Benevento|Radelchis I]], chief army officer and [[treasurer]] of Sicard, who proclaims himself ruler of [[Duchy of Benevento|Benevento]]. He imprisons [[Siconulf of Salerno|Siconulf]], heir and brother of Sicard, in [[Taranto]]. But [[Amalfi]]tan merchants, led by [[Landulf I of Capua|Landulf I]], the ''[[gastald]]'' of [[Principality of Capua|Capua]], and with the support of [[Guaifer of Salerno|Guaifer]], rescue him from prison. Siconulf is proclaimed prince of [[Principality of Salerno|Salerno]], and a [[civil war]] erupts, which splits the Lombard [[principality]] in [[Southern Italy]].<ref>Kreutz, Barbara M (1991). Before the Normans: Southern Italy in the Ninth and Tenth Centuries, p. 23 (University of Pennsylvania, Press: Philadelphia).</ref>
* [[Louis the Pious#Third civil war|Third Civil War]]: King [[Louis the German]], grandson of [[Charlemagne]], invades [[Swabia]]. His nephew, [[Pepin II of Aquitaine]], and his [[Gascony|Gascon]] subjects, conquer territory all the way to the [[Loire]].
* [[May 20]] — Thirteen months before his death, [[Louis the Pious]], successor to his father [[Charlemagne]], consents to the division of Charlemagne's empire among his sons in a declaration at [[Worms, Germany|Worms]]. Upon Louis I's death in 840, [[Lothair I|Lothair]] (age 45) is devised [[Middle Francia]] that includes Switzerland and northern Italy; [[Louis the German]] (Louis II), age 36, receives [[Eastern Francia]] that includes much of [[Germany]]; and [[Charles the Bald]] (17) gets [[West Francia]] that incorporates most of [[France]].
* The [[Hungarians]] (also known as Magyars) who until this time have lived east of the [[Carpathian Mountains|Carpathians]], raid the [[Danube|Lower Danube]] at the request of the [[First Bulgarian Empire|Bulgarian Empire]] against the [[Byzantine Empire|Byzantine]] insurgents.<ref>Bóna, István (2000). ''The Hungarians and Europe in the 9th-10th centuries''. Budapest: Historia - MTA Történettudományi Intézete, p. 11. {{ISBN|963-8312-67-X}}.</ref> 
* Approximate date &ndash; Danish [[Vikings]] return to ravage the [[Frisia]]n coast (sacking [[Dorestad]] for the second time).
* The first official mention of [[Andorra]] is recorded, in the [[manuscript]]s of the cathedral at [[La Seu d'Urgell]] (modern [[Spain]]).

==== Britain ====
* [[Ecgberht, King of Wessex]], dies after a 37-year reign, and is succeeded by his son [[Æthelwulf]] ("Noble Wolf") as ruler of [[Wessex]]. Æthelwulf's eldest son, [[Æthelstan of Kent|Æthelstan]], is made sub-king of [[Kingdom of Kent|Kent]], [[Kingdom of Essex|Essex]], [[Surrey]] and [[Kingdom of Sussex|Sussex]], under his father.{{sfnm|1a1=Stenton|1y=1971|1p=231|2a1=Kirby|2y=2000|2pp=155–56}}
* [[Battle of 839]]: [[Eóganan mac Óengusa]], King of the Picts, his brother Bran, [[Áed mac Boanta]], [[King of Dál Riata]], "and others almost innumerable" are killed in a battle fought by the men of [[Fortriu]] in Scotland against [[Vikings]].<ref>''[[Annals of Ulster]]''.</ref> [[Alpín mac Echdach]] (Alpín II) apparently succeeds Áed.</onlyinclude>