Shamelessly nicked from the Axis History forum.According to the records I have German Grandad was there in the 19th Infantry division "Durchbruch zwischen Gouzeaucourt and Vermand. In the Previous November he had been at hill 344 (Vor Verdun). His commander would have been GeneralLeutnant Walter Von Huelsen.
Interestingly she was at 3 CCS in Gezaincourt on the Somme. She was very complimentary of the German commander who captured the site, he was described as charming and a gentleman!
In Die Schlachten und Gefechte des Großen Krieges, 1914-1918, there are three major actions listed as starting on this date with “Durchbruchschlacht” or “Durchbruch” in the title:
• 21-22 March 1918: Der Durchbruch zwischen Gouzeaucourt und Vermand (The breakthrough between Gouzeaucourt and Vermand) – 2nd Army
• 21-22 March 1918: Durchbruchschlacht Monchy-Cambrai – 17th Army
• 21-22 March 1918: Durchbruchschlacht bei St. Quentin-La Fère – 18th Army