Viking raids in the Rhineland
The area known today as the Rhineland begins at the confluence of the Moselle and the Rhine and ends at Emmerich, where the Rhine divides into the Lek and the Waal to form a delta. In the east, the Rhineland ends close to the Rhine itself, being bounded by low mountain ranges such as the Siebengebirge or Bergisches Land. To the west its boundary is less well defined, but in general parlance it runs beyond the present state border with the Netherlands, i.e. east of the Meuse. Because the modern state of Rhineland-Palatinate lies south of the Moselle, the low mountain range of the Eifel north of the river is usually seen as belonging to the Rhineland. Areas south of the Moselle, such as the Hunsrück, are also considered to be part of the Rhineland.
Rheiderland
The Rheiderland is a region of Germany and the Netherlands between the River Ems and the Bay of Dollart. The German part of the Rheiderland lies in East Frisia, west of the Ems. The Dutch part (written: "Reiderland") lies in the Dutch province of Groningen and is mostly part of Oldambt. The Rheiderland is one of the four historic regions on the mainland in the district of Leer; the others being the Overledingerland, the Moormerland and the Lengenerland.