Viking Age
The history of Denmark between 793 AD and 1035
With the beginning of the Viking Age in the 9th century, the prehistoric period in Denmark ends. The Danish people were amongst those known as the Vikings during the 8th–11th centuries. Viking explorers first discovered and settled in Iceland in the 9th century, on their way from the Faroe Islands. From there, Greenland and Vinland (probably Newfoundland) were also settled. Utilizing their great skills in shipbuilding and navigation they raided and conquered parts of France and the British Isles.
They also excelled in trading along the coasts and rivers of Europe, running trade routes from Greenland in the north to Constantinople in the south via Russian and Ukrainian Rivers rivers, most notably along the River Dnieper and via Kiev, then being the capital of Kiev Rus. The Danish Vikings were most active in Britain, Ireland, France, Spain, Portugal and Italy where they raided, conquered and settled (their earliest settlements included sites in the Danelaw, Ireland and Normandy). The Danelaw resulted when Alfred the Great was forced to cede half his kingdom to the Vikings, who then settled there for a time and engaged in peaceful trade, but attacks eventually resumed and the English kings had to pay tribute (Danegeld).
Relations with Franks
In the early 9th century, Charlemagne's Christian empire had expanded to the southern border of the Danes, and Frankish sources (e.g. Notker of St Gall) provide the earliest historical evidence of the Danes. These report a King Gudfred, who appeared in present day Holstein with a navy in 804 where diplomacy took place with the Franks; In 808, King Gudfred attacked the Obotrites and conquered the city of Reric whose population was displaced or abducted to Hedeby. In 809, King Godfred and emissaries of Charlemagne failed to negotiate peace, despite the sister of Godfred being a concubine of Charlemagne, and the next year King Godfred attacked the Frisians with 200 ships.
Viking raids along the coast of France and the Netherlands were large-scale. Paris was besieged and the Loire Valley devastated during the 10th century. One group of Danes were granted permission to settle in northwestern France under the condition that they defend the place from future attacks. As a result, the region became known as "Normandy" and it was the descendants of these settlers who conquered England in 1066.
In addition, the Danes and Norwegians moved west into the Atlantic Ocean, settling on Iceland, Greenland, and the Shetland Isles. Brief Vikings expeditions to North America around 1000 did not result in any settlements and they were soon driven off by natives. Other Viking raids into Germany and the Mediterranean were short-lived and had no lasting effect.
United Denmark and Christianization
The oldest parts of the defensive works of Danevirke near Hedeby at least date from the summer of 755 and were expanded with large works in the 10th century. The size and amount of troops needed to man it indicates a quite powerful ruler in the area, which might be consistent with the kings of the Frankish sources. In 815 AD, Emperor Louis the Pious attacked Jutland apparently in support of a contender to the throne, perhaps Harald Klak, but was turned back by the sons of Godfred, who most likely were the sons of the above mentioned Godfred. At the same time St. Ansgar travelled to Hedeby and started the Catholic Christianisation of Scandinavia.
The Danes were united and officially Christianized in 965 AD by Harald Bluetooth, the story of which is recorded on the Jelling stones. The extent of Harald's Danish Kingdom is unknown, although it is reasonable to believe that it stretched from the defensive line of Dannevirke, including the Viking city of Hedeby, across Jutland, the Danish isles and into southern present day Sweden; Scania and perhaps Halland and Blekinge. Furthermore, the Jelling stones attest that Harald had also "won" Norway.
Cnut the Great
In retaliation for the St. Brice's Day massacre of Danes in England, the son of Harald, Sweyn Forkbeard mounted a series of wars of conquest against England. By 1014, England had completely submitted to the Danes. However, distance and a lack of common interests prevented a lasting union, and Harald's son Cnut (Canute) the Great barely maintained the link between the two countries, which completely broke up during the reign of his son Hardecanute. A final attempt by the Norwegians under Harald Hardrada to reconquer England failed, but did pave the way for William the Conqueror's takeover in 1066. Following the death of Canute the Great, Denmark and England were left divided and despite some attempts were never reunited.
Canute thanked the Norwegians for their patience and then went from assembly to assembly outlawing any sailor, captain or soldier who refused to pay a fine which amounted to more than a years harvest for most farmers. Canute and his housecarls fled south with a growing army of rebels on his heels. Canute fled to the royal property outside the town of Odense on Funen with his two brothers. After several attempts to break in and then bloody hand to hand fighting in the church, Benedict was cut down and Canute struck in the head by a large stone and then speared from the front. He died at the base of the main altar 10 July 1086, where he was buried by the Benedictines. When Queen Edele came to take Canute's body to Flanders, a light allegedly shone around the church and it was taken as a sign that Canute should remain where he was.
The death of St. Canute marks the end of the Viking Age. Never again would massive flotillas of Scandinavians meet each year to ravage the rest of Christian Europe.
Reference: Wikipedia