La grande offensive allemande de l'ouest By qsdegwdfgsdfgsdfghsdfg Mar 21, 1918 Picardie Period: Mar 21, 1918 to Jul 17, 1918 Offensive Allemande Mar 29, 1918 Bombardement de Paris Apr 9, 1918 Flandres May 27, 1918 Champagne Period: Jul 18, 1918 to Nov 11, 1918 Contre-offensive alliés Nov 11, 1918 Armistice