The Thuringian League is formed among the "Germans of the North Sea". Constituted after 453, it took over the original lands of the Alamanni confederation when the latter migrated south. The disappearance of the Hunnic Empire in this area restores an authority specific to the peoples of the Warnes and the Angles, who form a majority aristocracy among the others (Chauques, Jutes, Frisians and Saxons).
As the league remains outside the Roman Empire, no Latin chronicler mentions it; describing their protohistory is therefore only possible through the archaeological cultures found in the lands where they lived.
Inevitably, their land will bear their Thuringian name thereafter. Given the composition of the league, these lands are presumably those of the first Duchy of Saxony.
A founding legend of the Merovingians, written under the Merovingians in the 8th century, places their dominant aristocracy as the ancestor of Clovis I (the king through whom the Salians transit to the Merovingian dynasty).