Battle of Winterthur (919)

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In the battle of Winterthur in 919, King Rudolf II of Hochburgund , who tried to extend his rule into Thurgau , was defeated by Duke Burchard II of Swabia .

Alamannia and stronghold in the 10th and 11th centuries

Rudolf II strove to expand his empire in the northeast. He used the turbulence and rivalries in the neighboring Duchy of Swabia , where in the first quarter of the 10th century the noble families of the Ahalolfinger and the Burchardinger fought for supremacy. After the execution of the Ahalolfinger Duke Erchanger in 917, Burchard II, son of Duke Burchard I , who was executed in 911, rose up and took all of Erchanger's possessions and was recognized as a duke in all of Swabia.

Burchard II was then exposed to the aggressive expansion efforts of Rudolf II of Hochburgund. This had brought the Palatinate in Zurich under his power and pushed from there into the Thurgau and the Lake Constance area . There was a battle near Winterthur in 919. With his victory, Duke Burchard succeeded in fending off Rudolf II's territorial claims. The defeat cost Rudolf the Thurgau and the Zürichgau . In order to secure himself in the empire, Burchard recognized the newly elected East Franconian King Heinrich I in the same year , and he gave Burchard the fiscal property located in Swabia as well as extensive rights over dioceses and imperial monasteries.

In 922, the conflict with Rudolf II was finally settled when Burchard II married his daughter Berta to Rudolf and ceded the land west of the Reuss and south of the Rhine , essentially Aargau , and Rudolf's brother Ludwig became Count in the Swabian Thurgau made. The border between Swabia and Hochburgund was defined by the Huttwil-Aarwangen-Basel line.

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