In the 4th and 5th centuries AD, the Roman Empire was weakened by invasions from Germanic tribes, and Switzerland was eventually overrun by the Alemanni and the Burgundians. These Germanic tribes settled in the region and intermingled with the remaining Romanized Celts. The resulting population became known as the Swiss.
In the 13th century, Switzerland became a confederation of three cantons (Uri, Schwyz, and Unterwalden). The confederacy grew over time to include other cantons and eventually became the modern country of Switzerland.