The first battle of the Marne happened in Sept. 1914
View page
I am pretty sure it was the Second Battle of the Marne but I am
not a 100% sure.
No, The Third Battle of the Aisne happened before the Second
Battle of the Marne.
View page
The first Battle of the Marne was from September 5 to September
12, 1914. This battle was significant and changed the nature of the
war.
View page
The First Battle of the Marne took place from September 5 to
September 12, 1914. The Second Battle of the Marne took place from
July 15 to August 6, 1918.