The 860s decade ran from January 1, 860, to December 31, 869.
Year 861 (DCCCLXI) was a common year starting on Wednesday of the Julian calendar.
Year 866 (DCCCLXVI) was a common year starting on Tuesday of the Julian calendar.
Year 868 (DCCCLXVIII) was a leap year starting on Thursday of the Julian calendar.
Robert the Strong was the father of two kings of West Francia: Odo and Robert I of France. His family is named after him and called the Robertians. In 853, he was named missus dominicus by Charles the Bald, King of West Francia. Robert the Strong was the great-grandfather of Hugh Capet and thus the ancestor of all the Capetians.
The Duchy of Brittany was a medieval feudal state that existed between approximately 939 and 1547. Its territory covered the northwestern peninsula of Europe, bordered by the Atlantic Ocean to the west, and the English Channel to the north. It was also less definitively bordered by the river Loire to the south, and Normandy, and other French provinces, to the east. The Duchy was established after the expulsion of Viking armies from the region around 939. The Duchy, in the 10th and 11th centuries, was politically unstable, with the dukes holding only limited power outside their own personal lands. The Duchy had mixed relationships with the neighbouring Duchy of Normandy, sometimes allying itself with Normandy, and at other times, such as the Breton–Norman War, entering into open conflict.
Maine is one of the traditional provinces of France. It corresponds to the former County of Maine, whose capital was also the city of Le Mans. The area, now divided into the departments of Sarthe and Mayenne, has about 857,000 inhabitants.
Erispoe was Duke of Brittany from 851 to his death. After the death of his father Nominoe, he led a successful military campaign against the Franks, culminating in his victory at the Battle of Jengland. He is subsequently referred to as "King of Brittany".
Salomon was Count of Rennes and Nantes from 852 and Duke of Brittany from 857 until his assassination in 874. In 867, he was granted the counties of Avranches and Coutances, and he used the title King of Brittany intermittently after 868.
The history of Brittany may refer to the entire history of the Armorican peninsula or only to the creation and development of a specifically Brythonic culture and state in the Early Middle Ages and the subsequent history of that state.
Hastein was a notable Viking chieftain of the late 9th century who made several raiding voyages.
The counts of Nantes were originally the Frankish rulers of the Nantais under the Carolingians and eventually a capital city of the Duchy of Brittany. Their county served as a march against the Bretons of the Vannetais. Carolingian rulers would sometimes attack Brittany through the region of the Vannetais, making Nantes a strategic asset. In the mid-ninth century, the county finally fell to the Bretons and the title became a subsidiary title of the Breton rulers. The control of the title by the Breton dukes figured prominently in the history of the duchy. The County of Nantes was given to Hoel, a disinherited son of a duke. He lost the countship due to a popular uprising. That uprising presented an opportunity for King Henry II of England to attack the Breton duke. In the treaty ending their conflicts, the Breton duke awarded the county to Henry II.
The Marches of Neustria were two marches created in 861 by the Carolingian king of West Francia Charles the Bald. They were ruled by officials appointed by the Monarchy of France, known as wardens, prefects or margraves. One march was created as a buffer against the Bretons and the other against the Norsemen.
Lambert II was the Count of Nantes and Prefect of the Breton March between 843 and 851. Lambert ruled the county in opposition to Amaury, the puppet count installed by Charles the Bald, King of West Francia. At his death, the county was effectively in Breton control. Lambert was the son of Lambert I and his wife Itta.
Renaud (795–843) was Frankish Count of Herbauges, Count of Poitiers and Count of Nantes. His name is also spelled Rainaldus or Ragenold, and he is sometimes known as Reginald in English. He is referred to as Renaud of Aquitaine, but seems to have been a member of the Rorgonid family of Maine.
The Battle of Blain, also called the Battle of Messac, was fought on 24 May 843 by the forces of Lambert II of Nantes and Erispoe, prince of Brittany, against Renaud, Frankish Count of Nantes. It arose from Breton resistance to Frankish power within Brittany and disputes over control of the County of Nantes. The defeat of the Franks led to a period of Breton expansionism.
The Kingdom of Brittany was a short-lived vassal-state of the Frankish Empire that emerged during the Norse invasions. Its history begins in 851 with Erispoe's claim to kingship. In 856, Erispoe was murdered and succeeded by his cousin Salomon.
The medieval castle of Pouancé is located in Pouancé, Maine-et-Loire, France, at the western border of the old province of Anjou, where it was built as a defence against Brittany. Along with the remains of the city walls, it covers a surface of three hectares. It is nicknamed the "second castle of Anjou" because of its size, which is just less than that of the castle of Angers. It belongs to the Breton march, facing the Breton castle of Châteaubriant.
The Battle of Trans-la-Fôret was fought on 1 August 939 between the occupying Vikings and the Bretons, led by a joint army of Alan II, Hugh II of Maine, and Judicael Berengar.
Vikings were active in Brittany during the Middle Ages, even occupying a portion of it for a time. Throughout the 9th century, the Bretons faced threats from various flanks: they resisted full incorporation into the Frankish Carolingian Empire yet they also had to repel an emerging threat of the new duchy of Normandy on their eastern border by these Scandinavian colonists.
Kingdom of Brittany 
