A. Land and population in pre-Roman times
G. comprises the most western part of the European rump, between the Rhine, the Alps, the Mediterranean, the Pyrenees and the Atlantic. Five large river-systems supply the land with water: the Garumna (Garonne) in the south-west, the Liger (Loire) in the centre and the west, the Sequana (Seine) in the north, the Mosa (Maas) with a tributary of the Rhine, the Mosella (Mosel), in the no…