Vikings were a seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe. They voyaged as far as the Mediterranean, North Africa, the Middle East, Greenland, and Vinland (present-day Newfoundland in Canada, North America). In their countries of origin, and in some of the countries they raided and settled, this period of activity is popularly known as the Viking Age, and the term "Viking" also commonly includes the inhabitants of the Scandinavian homelands as a whole during the late 8th to the mid-11th centuries. The Vikings had a profound impact on the early medieval history of northern and Eastern Europe, including the political and social development of England (and the English language) and parts of France, and established the embryo of Russia in Kievan Rus'.

Expert sailors and navigators of their characteristic longships, Vikings established Norse settlements and governments in the British Isles, the Faroe Islands, Iceland, Greenland, Normandy, and the Baltic coast, as well as along the Dnieper and Volga trade routes across Eastern Europe where they were also known as Varangians. The Normans, Norse-Gaels, Rus, Faroese, and Icelanders emerged from these Norse colonies. At one point, a group of Rus Vikings went so far south that, after briefly being bodyguards for the Byzantine emperor, they attacked the Byzantine city of Constantinople. Vikings also voyaged to the Caspian Sea and Arabia. They were the first Europeans to reach North America, briefly settling in Newfoundland (Vinland). While spreading Norse culture to foreign lands, they simultaneously brought home slaves, concubines, and foreign cultural influences to Scandinavia, influencing the genetic and historical development of both.

The Kingdom of the Franks (Latin: Regnum Francorum), also known as the Frankish Kingdom or Francia, was the largest post-Roman kingdom in Western Europe. It was established by the Franks, one of the Germanic peoples. Its founder was King Clovis I who united Frankish tribes and expanded the Frankish realm into the Roman Gaul. During the Early Middle Ages, the kingdom was ruled by the Merovingian and Carolingian dynasties. In 800, it evolved into the Carolingian Empire, thus becoming the longest lasting Germanic kingdom from the era of Great Migrations.

Originally, the core Frankish territories inside the former Western Roman Empire were located close to the Rhine and Meuse rivers in the north, but Frankish chiefs such as Chlodio expanded their influence within Roman territory as far as the Somme river in the 5th century.

Childeric I, a Salian Frankish king, was one of several military leaders commanding Roman forces of various ethnic affiliations in the northern territory. His son Clovis I succeeded in unifying most of Gaul under his rule by notably conquering Soissons in 486 and Aquitaine in 507, as well as establishing leadership over all the Frankish kingdoms on or near the Rhine frontier; thus founding what became the Merovingian dynasty. The dynasty subsequently gained control over a significant part of what is now western and southern Germany. It was by building upon the basis of these Merovingian deeds that the subsequent Carolingian dynasty—through the nearly continuous campaigns of Pepin of Herstal, his son Charles Martel, grandson Pepin the Short, and great-grandson Charlemagne—secured the greatest expansion of the Frankish state by the early 9th century.