Map of the Northwestern Front from March 21 to August 21, 1918. Despite the caption, the map shows primarily the German offensives against the British sector, Operations Michael and Georgette. From The War of the Nations Portfolio in Rotogravure Etchings. © Copyrighted 1919 by the New York Times Company
The above map shows the battleline when the German offensive of March 21, 1918 was launched, the furthest point reached in that advance, and the territory recovered up to August 21 by the Allies in Foch's counterattack of July 18.
"Next to attack was Mangin, with an opening move on 17 August, developing into a full and very successful local assault between the Aisne and the Oise on the 20th. A further assault by the British 3rd Army opened on the 23rd, followed by a second combined Rawlinson and Debeney attack which in the event achieved little. Yet another British attack, by the 1st Army on the northern end of the Cambrai to the Aisne Hindenburg Line, opened on 26 August and was complemented by renewed vigorous pressure by Mangin at the southern end, forcing the Germans to withdraw from positions carefully prepared for the winter."
Summary of Allied attacks after Battle of Amiens, begun on August 8, 1918 through August 26. French General Charles Mangin had struck the first blow in July in the Second Battle of the Marne, to begin reducing the Marne Salient, eliminating it entirely with subsequent attacks. In the Battle of Amiens, Generals Henry Rawlinson commanding the British 4th Army and Marie-Eugène Debeney the French 1st Army had driven the Germans back 12 miles, and continued their attacks later in the month.
Paths of Glory: The French Army 1914-18 by Anthony Clayton, page 173, copyright © Anthony Clayton 2003, publisher: Cassell, publication date: 2005
1918-08-26, 1918, August, Mangin, Rawlinson, Debeney, Northwestern Front 1918-03-21-08-21
