What was the immediate military consequence of the First Battle of the Marne?

• A. It halted the German rapid advance and led to trench warfare stalemate on the Western Front.
• B. It forced a quick collapse of German lines elsewhere.
• C. It opened a path for Allied invasion of Germany.
• D. It resulted in immediate peace on the Western Front.

Answer: (A)

The immediate effect being tested is the stoppage of a rapid German push into France. The First Battle of the Marne halted the German advance on Paris, forcing a retreat and breaking the momentum of the Schlieffen Plan. That interruption prevented a quick French defeat and set the Western Front into a long, static line of trenches from the North Sea to Switzerland. In the short term, this meant no quick German victory and no swift Allied invasion of Germany; instead, it ushered in years of brutal stalemate.