Because it may have good soil, but it doesn't provides any natural barriers to the west.
~MAAHHAA
The plains contain rich farmland, but doesn't provide any natural barriers to the west
The Great European Plain, which consists of the Northern European Plain and the East European Plain.
Northern European plain is tundra.
European Plain
The Northern European Plain
Europe
Europe
Paris is not located in the Northern European Plain, but Berlin is.
The Northern European Plain.
Europe
It is called, appropriately, the Northern European Plain. It runs from the Netherlands across Germany and Poland to the East European Plain.
no