The Merovingian king.

Clovis was the first king of the Franks to unite all of the Frankish tribes under one ruler, changing the form of leadership from a group of petty kings to rule by a single king and ensuring that the kingship was passed down to his heirs. He is considered to have been the founder of the Merovingian dynasty, which ruled the Frankish kingdom for the next two centuries.

Clovis succeeded his father, Childeric I, as a king of Salian Franks in 481, and eventually came to rule an area extending from what is now the southern Netherlands to northern France, corresponding in Roman terms to Gallia Belgica (northern Gaul). At the Battle of Soissons (486) he established his military dominance of the rump state of the fragmenting Western Roman Empire which was then under the command of Syagrius. By the time of his death in either 511 or 513, Clovis had conquered several smaller Frankish kingdoms in the northeast of Gaul including some northern parts of what is now France. Clovis also conquered the Alemanni tribes in eastern Gaul, and the Visigothic kingdom of Aquitania in the southwest. These campaigns added significantly to Clovis's domains, and established his dynasty as a major political and military presence in western Europe.

Clovis is important in the historiography of France as "the first king of what would become France". Clovis was baptized on Christmas Day in 508. The adoption by Clovis of Catholicism (as opposed to the Arianism of most other Germanic tribes) led to widespread conversion among the Frankish peoples; to religious unification across what is now modern-day France, the Low Countries and Germany; three centuries later, to Charlemagne's alliance with the Bishop of Rome; and in the middle of the 10th century under Otto I the Great, to the consequent birth of the early Holy Roman Empire.