The earliest reliable references to the Franks appear in Roman sources from the third century CE, though their tribal origins likely extend much deeper into the prehistoric past. Like other Germanic peoples, the Franks emerged from the complex process of ethnogenesis that characterized the barbarian world during the late imperial period. They were not a single homogeneous tribe but rather a confederation of related groups who shared similar languages, customs, and political structures. Archaeological evidence suggests that their material culture developed from earlier Germanic traditions dating back to the first centuries CE, with distinctive burial practices, settlement patterns, and artifact styles that would become characteristic of Frankish civilization.
The Roman historian Ammianus Marcellinus provides some of our earliest detailed descriptions of the Franks, portraying them as formidable warriors who lived in the frontier regions beyond the Rhine. Like other Germanic peoples, they were organized into warrior bands led by chiefs who gained and maintained their authority through success in battle and their ability to distribute wealth and land to their followers. This system of personal loyalty and military service would become fundamental to medieval European society, but in its earliest form among the Franks, it represented an adaptation to the constant warfare and political instability that characterized the barbarian world.