They didn't.
What year and day did Germany invade France?
They went through Belgium to invade France.
Germany went through Belgium to invade France, more precisely the hilly region of the Ardennes.
monday
Belgium
Germany invaded France in May 10, 1940. On June 22, France surrendered and Germany captured Paris.
Along the border of Belgium and France.
Germany
Through Belgium
Germany, France and Italy
France
Marched across the border.