Danish March
The terms Danish March and March of Schleswig ( or ' ) are used to refer to a territory in modern-day Schleswig-Holstein north of the Eider and south of the Danevirke . 
<triplet> Eider <subj> Schleswig-Holstein <obj> located in the administrative territorial entity <triplet> Danevirke <subj> Schleswig-Holstein <obj> located in the administrative territorial entity