March – Arnulf of Carinthia proceeds to Piacenza, and from there invades central Italy. After a successful campaign, he calls the invasion off and returns to Pavia – probably because Duke Rudolph I of Burgundy was threatening to invade Lorraine. Arnulf has himself proclaimed King of Italy at Pavia, leaving Berengar I as his vice-regent in Italy.
Arnulf of Carinthia returns to Germany through the Alps, harried by militias dispatched by Rudolph I of Burgundy and margrave Anscar I of Ivrea. Only with much difficulty is Arnulf able to get his army through the Aosta Valley and through St. Moritz, back into Germany. Guy III descends from the Apennines, and re-seizes the Italian kingdom.
December – Guy III dies after a 4-year reign, and is succeeded by his 14-year-old son Lambert, already associated as co-emperor since 892. At the pleading of Archbishop Fulk of Reims, Pope Formosus reconciles with the young emperor. Lambert proceeds from Spoleto to Pavia, where he is acclaimed and crowned with the Iron Crown of Lombardy.
King Anarawd of Gwynedd's shaky alliance with the Vikings collapses. His kingdom is ravaged by the Norsemen. Anarawd is forced to ask for help from Alfred the Great and submits to his overlordship. Alfred imposes oppressive terms and forces Anarawd's confirmation in the Christian Church, with Alfred as 'godfather'.
The Magyars are expelled from southern Russia, and settle in the Carpathian Basin, under the leadership of Árpád (The traditional date of 896 held during the 20th century has proved to be erroneous). Emperor Leo VI (the Wise) seeks aid from the Magyars, and after crossing the Danube on Byzantine ships, they ravage Bulgarian territory.
May – Arnulf of Carinthia summons the Imperial Diet in his residence at Worms. Angered by the non-appearance of Charles the Simple, he again supports Odo's claim to the throne of the West Frankish Kingdom. In the same assembly, he crowns Zwentibold as king of Lotharingia.
Guy IV, duke of Spoleto, conquers Benevento (after the Byzantines have moved the capital of Byzantine Italy from Benevento to Bari). Guy makes himself prince, thereby uniting the two Italian states. The Byzantines attempt to retake Benevento, but are defeated by Lombard troops.
December – Arnulf of Carinthia invades Italy, at the head of a East Frankish expeditionary army. He arrives in Pavia and reorganizes the Lombard state. Arnulf partitions the northern part of the kingdom: the western half (March of Lombardy) and the eastern half (March of Verona).
King Anarawd of Gwynedd is supplied with English troops, to assist in his reconquest of Seisyllwg (Wales). He is successful, and his brother Cadell is finally able to take his rightful place on the Seisyllwg throne.
November – Lambert II and Berengar I agree to sign a treaty at Pavia. Berengar receives the realm between the Adda and the Po, while the rest stays under control of Lambert (including the March of Tuscany). They share Bergamo, and Lambert pledges to marry Gisela, Berengar's daughter.
English warships (nine vessels from Alfred's new fleet) intercept six Viking longships in the mouth of an unknown estuary on the south coast (possibly at Poole Harbour) in Dorset. The Danes are blockaded, and three ships attempt to break through the English lines. Lashing the Viking boats to their own, the English crew board the enemy's vessels and kill everyone on board. Some ships manage to escape, two of the other three boats where driven against the Sussex coast. The shipwrecked sailors are brought before King Alfred the Great at Winchester and hanged. Just one Viking ship returns to East Anglia.
January – The Cadaver Synod: Lambert II orders Stephen VI to exhume the nine-month-old cadaver of former pope Formosus, to redress in papal robes and placed in a chair on trail at St. Peter's. Formosus is 'convicted' of several crimes, his fingers of consecration are cut off, and the body is stripped of his vestments.
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.
Summer – King Arnulf of Carinthia enlists the support of the Magyars to raid northern Italy. They overrun the Lombard plain all the way to Pavia. King Berengar I assembles a large army against the Magyars and confronts them near the Adda River. Daunted at the strong force, Árpád (head of the confederation of the Hungarian tribes) offers to make peace and restore much of what they've taken, if they are permitted to leave Italy unmolested. Berengar refuses and the Magyars withdraw to the Brenta River. Árpád renews his offer, offering to leave all his booty and even some hostages. Again Berengar refuses, and awaits them to cross the Brenta River for a final battle.
Battle of the Brenta: The Magyars, consisting of 5,000 men, take a circuitous route through the mountains, crossing the Brenta River and proceed south to fall upon the encamped Lombard army (15,000 men) at Cartigliano. The Magyars massacre much of Berengar's unprepared army. He himself manages to escape to Pavia, changing his dress with the clothing of one of his soldiers. Árpád renews the offensive and heads across Lombardy, pillaging the countryside around Treviso, Vicenza, Bergamo and other towns all the way to Vercelli. He turns south and heads down the Aemilian Road, sacking Reggio Emilia, Modena and Bologna.
Winter – The Magyars turn back north towards the shores of the Venetian Lagoon. They pillage Chioggia and Pellestrina, and advance towards Malamocco. Their advance into the lagoon is checked by the assembly of the Venetian fleet under doge Pietro Tribuno, which defeats the Magyar's river-crossing vessels at Albiola and they pull back. The close-call with the Magyars prompts the Venetians to initiate the fortification of the Rialto and the building of protective chains over the Grand Canal.
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 making his own translations of Latin works. He is succeeded by his eldest son, Edward the Elder as king of Wessex.