(A) ** Area in between France/Belgium and Germany
(B) Area in betweeb Germany and Russia
EXPLANATIONS BELOW
Concept note-1: -The Western Front, a 400-plus mile stretch of land weaving through France and Belgium from the Swiss border to the North Sea, was the decisive front during the First World War.
Concept note-2: -The Western Front was a military theatre of World War II encompassing Denmark, Norway, Luxembourg, Belgium, the Netherlands, the United Kingdom, France, and Germany.
Concept note-3: -The Western Front was the place where the most powerful military forces in Europe, the German and French armies, met and where the First World War was decided.