In 1199 Duke Valdemar of Schleswig attacked Adolf III's newly rebuilt castle at Rendsburg on the Eider island, and in the summer a Danish army faced Adolf and Archbishop Hartwig across the Eider for a long time before going home without a battle.
Adolf will hand Rendsburg to Canute VI during 1200. The ground on both banks of the Eider crossing, from the Sorge and Hohn to the Levensau and the edge of the Danish Wold, is the frontier zone where raids came and went in 1199.
How things stand that morning
A live frontier with no truce known; whether the land was too raided to farm is not shown by the sources used.
Who raids here
Duke Valdemar's men from Schleswig into Holstein; Adolf III's men into the Danish march.
Anchors on each side
Holstein: Rendsburg castle. Danish: Schleswig and the Danevirke.
Last campaign
Summer 1199 (Danish army on the Eider; no battle).
Where the sources disagree
Evidence: The 1199 attack and stand-off are attested; the extent of raiding is not.
Sources and studies
- Wikipedia: Canute VI of Denmark
- Wikipedia (de): Hartwig II. (Bremen)
- NDB (Maybaum 1953) and ADB (Jansen 1875): Adolf III., Graf von Holstein
- Wikipedia (de): Rendsburg
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.