Seine
Great Britain, France, Belgium, Portugal, I randomly picked those; there are actually many more.
Luxembourg and Belgium are both bordered by France and Germany
The Mississippi river!
France built the Maginot line, after the name of a minister who built it. It was a line of forts running on the eastern border to protect France against Germany, but which proved useless as the German invasion went by another route through Belgium.
Loire, Seine, Rhône,Gironde,Garrone and some others but I DON'T KNOW THEM
The Yser is a river in the County of Flanders, France. The Yser starts in French Flanders, flows into Belgium and into the North Sea.
Lille is situated on the Deûle River, near France's border with Belgium.
Gaul was not a who. It was a geographical area. It was the name the Romans gave to an area which covered present day France, Belgium, Holland south of the river Rhine and Germany west of the same river.
There are different rivers flowing from France through Belgium. These are the main rivers: La Meuse (going on in The Netherlands) L'Escaut (Scheldt in Dutch) (going on in The Netherlands) L'Yser And then you have some side-rivers: Leie Semois ...
France was known as Gallia and Belgium as Belgica. But Gallia is smaller then France and Belgica is bigger then Belgium. So check a map.
Great Britain, France, Belgium, Portugal, I randomly picked those; there are actually many more.
Aalst
I guess you are looking for Maas, the Dutch name for what is in French La Meuse. Also possible is Ijzer or in French Yser.
Lille
Gaul
Belgium, Luxembourg
Either france,or poss belgium....its a french name