940s

Below are some of the important events that happened from 940 to 949.
940
Saadia Gaon makes his siddur (Jewish prayer book) in Iraq.
Narita-san Temple is founded in Chiba, Japan.
The Liao Dynasty stops the rule that a younger sister replace an older sister who died in marriage.
Births
Abu'l-Wafa, Iranian mathematician
Brian Boru, high king of Ireland
Deaths
July 20 - Ibn Muqla, Abbasid vizier and calligrapher
December 25 - Makan ibn Kaki, Dailamite warlord
Taira no Masakado, leader of the Taira Clan
941
The Rus'-Byzantine War is fought.
Oda the Severe becomes Archbishop of Canterbury.
Births
Charles d'Outremer, son of Louis IV of France
Brian Borumha mac Cennetig, High-King of Ireland
Deaths
April 21 - Bajkam, commander of commanders of the Abbasid Caliphate
942
The Chavda Kingdom is overthrown in Gujarat, India.
October 30 - Pope Marinus II succeeds Pope Stephen VIII as the 128th pope.
Births
Pampa, Kannada poet in India
Genshin, Tendai scholar
Deaths
King Idwal Foel of Gwynedd
December 17 - William I of Normandy
Gaozu of Later Jin, founder of the Later Jin Dynasty in China
Liu Yan of the Southern Han Kingdom
943
King Constantin II of Scotland retires and becomes a monk. His cousin Malcolm I of Scotland becomes king.
Births
Dayang Jingxuan, a Zen Buddhist monk
Deaths
Wang Kon, founder of the Koryo dynasty
Emperor Liezu of Southern Tang
944
The city of Algiers is (re)founded by the Zirid king Buluggin ibn Ziri.
Abu Yazid starts a rebellion against the Fatimids in the Aures Mountains.
The Al-Askari Mosque is built in Samarra.
King Edmund I of England takes Northumbria from the Vikings.
Emperor Romanos I Lekapenos is deposed as Byzantine emperor. It was by his own sons, Stephen Lekapenos and Constantine Lekapenos.
Births
Otto, Duke of Burgundy
Minamoto no Yorimitsu
Fujiwara no Sukemasa
Fujiwara no Akimitsu
Deaths
Flaithbertach mac Inmainen, abbot of Inis Cathaig, Ireland
Wilgred of Lindisfarne, Bishop of Lindisfarne
Abu Mansur Al Maturidi, Muslim theologian
Ngo Quyen, Vietnamese prefect and general
Wichmann the Elder, Saxon nobleman
Donnchad Donn, King of Ireland
945
The Buyid dynasty takes control of Baghdad.
The Min Kingdom is taken over by the Southern Tang Kingdom.
Edmund I of England conquers Strathclyde. He makes an alliance with Malcolm I of Scotland and gives Cumberland and Westmorland to him.
Lothair II of Italy takes control of Italy.
Romanos I Lekapenos is overthrown. Byzantine Emperor Constantine VII rules alone.
Births
Abbo of Fleury, French monk
Deaths
Igor of Kiev
King Kresimir I of Croatia
946
Eadred I becomes king of England.
Emperor Murakami becomes Emperor of Japan.
May 10 - Pope Agapitus II succeeds Pope Marinus II as the 129th pope.
Deaths
May 17 - Al Qa'im, second Fatimid caliph.
May 26 - King Edmund I of England
947
The Later Jin Dynasty falls to the Later Han Dynasty in China.
Births
Adelaide of Anjou, daughter of Fulk II of Anjou and Gerberg
Deaths
May 18 - Emperor Taizong of the Liao Dynasty
Topiltzin Ce Acatl Quetzalcoatl, Toltec ruler
Wulfgar of Lichfield, Bishop of Lichfield
Sexhelm of Lindisfarne, Bishop of Lindisfarne
Shi Chonggui, last Emperor of China from the Later Jin Dynasty
Uchtred of Lindisfarne, Bishop of Lindisfarne
Zoltan of Hungary, Grand Prince of the Magyars
948
The Nri Kingdom is started by Eri. The kingdom was in what is now Nigeria.
The Nallur Kandaswamy temple is built.
Births
Gang Gam-chan, Korean government official and military commander
Emperor Jingzong of Liao
Deaths
December 16 - Romanos I Lekapenos, Byzantine Emperor
Gao Conghui
Gaozu of Later Han
949
The Byzantine Empire starts another expedition against the Emirate of Crete.