9 JUN--This Day in US Military History

1918 – Under orders form General Erich Ludendorff, the deputy chief of the German General Staff, General Oskar von Hutier’s Eighteenth Army launches the fourth in a series of offensives.

Ludendorff is aiming to unite two salients, carved out in previous attacks, in the Amiens and Aisne-Marne sectors. Hutier is to attack westward along the Matz River, a tributary of the Oise River, in the direction of Noyon and Montdidier. The commander of the Third French Army, however, General Georges Humbert, has been forewarned by deserters of the German attack and organizes his defenses accordingly. He initiates an artillery bombardment on the enemy assault troops shortly before their onslaught. This is still unable to prevent the Germans from gaining some 5 miles on the first day of their attack which is codenamed Gneisenau.
French resistance intensifies over the following days and the attempted link-up between Hutier’s troops and the German Seventh Army under General Max von Boehn, which began an attack from Soissons on the 10th, fails. Meanwhile, French general Charles Mangin has organized a counterattacking force of three French and two US divisions. These strike the Eighteenth Army on the 12th, forcing Ludendorff to call off the operation the following day.

https://thisdayinusmilhist.wordpress.com/2005/06/09/june-9/