Alamannia or Alemannia was the territory inhabited by the Germanic Alemanni after they broke through the Roman limes in 213. The Alemanni expanded from the Main basin during the 3rd century, raiding the Roman provinces and settling on the left bank of the Rhine from the 4th century.

Alamannia or Alemannia was the territory inhabited by the Germanic Alemanni after they broke through the Roman limes in 213. The Alemanni expanded from the Main basin during the 3rd century, raiding the Roman provinces and settling on the left bank of the Rhine from the 4th century.