Alamannia was the territory inhabited by the Germanic Alamanni after they broke through the Roman limes in 213. The Alamanni 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. Ruled by independent tribal kings during the 4th to 5th centuries, Alamannia lost its independence and became a duchy of the Frankish Empire in the 6th century, and with the beginning formation of the Holy Roman Empire under Conrad I in 911 became the Duchy of Swabia. The term Swabia was often used interchangeably with Alamannia in the 10th to 13th centuries.
The territory of Alamannia as it existed from the 7th to 9th centuries corresponds roughly to what is today the German region of Swabia, the French Alsace and the eastern part of the Swiss plateau (Eastern and Central Switzerland).
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