AD 884: March 1 – Diego Rodríguez Porcelos, count of Castile, founds and repopulates (repoblación) Burgos and Ubierna (Northern Spain), under the mandate of King Alfonso III of Asturias.
AD 886: King Alfred receives the formal submission of all of the citizens of England not under Viking rule, and adopts the title King of the Anglo-Saxons.
AD 887: Wunengzi was written by an anonymous philosopher. It is considered the earlist work about anarchism (though the name "anarchism" had not been invented until one thousand years later) in China.
AD 888: Adarnase IV managed to unify most Georgian lands (except for Kakheti and Abkhazia) and was crowned King of the Iberians, restoring the monarchy abolished three centuries prior.
AD 890: The Frankish nobles, who have ruled Provence in anarchy (since 887), declare Louis the Blind (a son of the late usurper King Boso) ruler of Lower Burgundy, at an assembly at Valence.
AD 892: Former Silla general Kyŏn Hwŏn seizes the cities of Wansanju and Mujinju, taking over the territory of Baekje. He wins the support of the people, and declares himself king.
AD 894: Spring – King Arnulf of Carinthia invades Italy at the head of an East Frankish expeditionary army, joining up with the deposed king Berengar I at Verona. He conquers Brescia after little resistance, and sacks Bergamo after a one-month siege. The cities of Milan and Pavia open their doors to Arnulf. Emperor Guy III escapes from Pavia, to hide in the mountains of Spoleto (Umbria).
AD 896: Emperor Zhao Zong appoints Li Keyong, a Shatuo military governor (jiedushi), as Prince of Jin. He becomes the first ruler of Jin (see 907) following the collapse of the Tang dynasty.
AD 898: October 15 – Lambert II dies from falling off his horse while hunting — or is killed (possibly assassinated by supporters of Maginulf of Milan). After the death of Lambert, his rival Berengar I gains recognition as king of Italy. He releases Adalbert II and receives homage from the Italian nobles.
AD 899: October 26 – King Alfred the Great dies after a 28-year reign in which he has forced invading Danish Vikings to withdraw, consolidated England around Wessex, divided parts of Mercia into shires, compiled the best laws of earlier kings, encouraged learning by bringing famous scholars to Wessex and made his own translations of Latin works. He is succeeded by his eldest son, Edward the Elder as king of Wessex.
AD 900: The Persian scientist Muhammad ibn Zakariya al-Razi distinguishes smallpox from measles in the course of his writings. Holding against any sort of orthodoxy, particularly Aristotle's physics, he maintains the conception of an 'absolute' time, regarded by him as "a never-ending flow".
AD 901: Liu Jishu, the most powerful eunuch who had imprisoned Emperor Zhaozong of Tang Dynasty, was assassinated by Prime Minister Cui Yong and associated warlords. The Emperor was not controlled by eunuchs any more, but instead was controlled by military governors (jiedushi).
AD 902: April 5 – Caliph Al-Mu'tadid dies in Baghdad after a 10-year reign. Possibly poisoned in a palace intrigue, he is succeeded by his eldest son Al-Muktafi as ruler of the Abbasid Caliphate.
AD 904: September 22 – The warlord Zhu Quanzhong kills Emperor Zhao Zong, along with his family and many ministers, after seizing control of the imperial government. Zhu places Zhao Zong's 13-year-old son Ai (Li Zhou) on the imperial throne as a puppet ruler of the Tang dynasty.
AD 905: Cadell ap Rhodri, king of Seisyllwg (Wales), makes his 25-year-old son Hywel ap Cadell ruler of Dyfed, having conquered that territory. Rhodri ap Hyfaidd, nominally king of Dyfed, is caught and executed, at Arwystli.
AD 906: 906 K'argop' earthquake: It takes place in the monastery K'argop', Armenia. The monastery is also known as Xotakerk', the monastery of the Vegetarians. The earthquake occurs approximately 150 years following the 735 Vayots Dzor Province earthquake, and affects the same region.
AD 908: September 13 – Battle of Belach Mugna: In an alliance with the kings Cerball mac Muirecáin of Leinster, Cathal mac Conchobair of Connacht, and Cellach mac Cerbaill of Osraige, High King Flann Sinna defeats the forces of King Cormac mac Cuilennáin of Munster near Castledermot (County Kildare).
AD 910: William I (the Pious) of Aquitaine, donates land in Burgundy for the building of a Benedictine monastery dedicated to the saints Peter and Paul. Hence the Abbey of Cluny, becomes the largest in the West. In the foundation charter, William renounces all rights to the monastery and nominates Berno as the first abbot of Cluny (Eastern France). He places the monastery directly under the control of the Papal See.
AD 914: January 24 – The Fatimid general, Hubasa ibn Yusuf of the Kutama Berber tribe, marches out with his troops to invade Egypt. He follows the coastline, and takes possession of the only two towns of any size Syrte and Ajdabiya, without a struggle. The garrisons of the two towns—the westernmost outposts of the Abbasid Caliphate—have already fled.
AD 915: John X crowns the Italian sovereign Berengar I as the Holy Roman Emperor in Rome. Berengar returns to northern Italy, where Friuli is threatened by the Hungarians.
AD 916: Abaoji, Khitan ruler and founder of the Liao Dynasty, adopts Chinese court formalities in which he declares himself emperor in the Chinese style and adopts an era name, Taizu of Liao. He names his eldest son Yelü Bei as heir apparent, a first in the history of the Khitan. Abaoji leads a campaign in the west, conquering much of the Mongolian Plains.
AD 917: The Khitan people sieged the city of Youzhou, belonging to the State of Former Jin, with more than 100 thousand men, while only 30 thousand men were defending the city. However, thanks to excellent military commanding, Former Jin defeated the Khitans.
AD 918: December 23 – King Conrad I, injured at one of his battles with Arnulf I (the Bad), dies at his residence in Weilburg Castle after a 7-year reign. On his deathbed Conrad persuades his younger brother Eberhard III to offer the East Frankish crown to Henry the Fowler, the duke of Saxony. Conrad is buried in Fulda Cathedral (also the burial place of Boniface) in Germany.