I want to know the answer to the following question:
Which battle was the second of three key French losses?
All the background I'm provided with is that "Moltke had originally planned to keep Bazaine's army on the Saar River until he could attack it with the 2nd Army in front and the 1st Army on its left flank, while the 3rd Army closed towards the rear.". Is that enough to answer the question?
Answer: no