The Cherusci were a Germanic tribe that inhabited parts of the plains and forests of northwestern Germany in the area of the Weser River and present-day Hanover during the first centuries BC and AD. Roman sources reported they considered themselves kin with other Irmino tribes and claimed common descent from an ancestor called Mannus. During the early Roman Empire under Augustus, the Cherusci first served as allies of Rome and sent sons of their chieftains to receive Roman education and serve in the Roman army as auxiliaries. The Cherusci leader Arminius led a confederation of tribes in the ambush that destroyed three Roman legions in the Teutoburg Forest in AD 9. He was subsequently kept from further damaging Rome by disputes with the Marcomanni and reprisal attacks led by Germanicus. After rebel Cherusci killed Arminius in AD 21, infighting among the royal family led to the highly Romanized line of his brother Flavus coming to power. Following their defeat by the Chatti around AD 88, the Cherusci do not appear in further accounts of the German tribes, apparently being absorbed into the late classical groups such as the Saxons, Thuringians, Franks, Bavarians, and Allemanni.

The Germanic peoples were historical groups of people that once occupied Northwestern and Central Europe and Scandinavia during antiquity and into the early Middle Ages. Since the 19th century, they have traditionally been defined by the use of ancient and early medieval Germanic languages and are thus equated at least approximately with Germanic-speaking peoples, although different academic disciplines have their own definitions of what makes someone or something "Germanic". The Romans named the area belonging to North-Central Europe in which Germanic peoples lived Germania, stretching east to west between the Vistula and Rhine rivers and north to south from southern Scandinavia to the upper Danube. In discussions of the Roman period, the Germanic peoples are sometimes referred to as Germani or ancient Germans, although many scholars consider the second term problematic since it suggests identity with present-day Germans. The very concept of "Germanic peoples" has become the subject of controversy among contemporary scholars. Some scholars call for its total abandonment as a modern construct since lumping "Germanic peoples" together implies a common group identity for which there is little evidence. Other scholars have defended the term's continued use and argue that a common Germanic language allows one to speak of "Germanic peoples", regardless of whether these ancient and medieval peoples saw themselves as having a common identity. While several historians and archaeologists continue to use the term "Germanic peoples" to refer to historical people groups from the 1st to 4th centuries CE, the term is no longer used by most historians and archaeologists for the period around the Fall of the Roman Empire and the Early Middle Ages.