June 18—A strong and concerted attack is being made by the British and French upon the German front from east of Ypres to south of Arras; British retain a first line of German trenches won east of Ypres.
June 19—French carry by assault the position of Fond de Buval, a ravine west of the road between Souchez and Aix-Noulette, where fighting has been in progress since May 9; French advance northwest of the labyrinth; French advance farther on the Fecht River in Alsace, Germans evacuating Metzeral, after setting it on fire.
June 20—Germans make a strong attack on the French lines in the Western Argonne, the French stating that it was preceded by a bombardment with asphyxiating projectiles.
June 21—French take trenches on the heights of the Meuse; in Lorraine the French advance and take the works to the west of Gondrexon; in Alsace the French are advancing beyond Metzeral in the direction of Meyerhof.
June 22—It is officially announced that the French are in possession of the labyrinth, for which furious fighting has been in progress day and night since May 30; the labyrinth consists of a vast network of fortifications built by the Germans between Neuville-St. Vaast and Ecurie, north of Arras, forming a salient of the German line.
June 25—On the heights of the Meuse, at the Calonne trench, Germans make a violent night attack, with the aid of asphyxiating bombs and flaming liquids, and penetrate that portion of the former German second line of defense recently taken by the French, but the French retake the ground by a counter-attack.
June 26—Germans retake some of their trenches north of Souchez.
June 27—Violent artillery fighting occurs in Belgium and north of Arras.
June 28—Severe artillery duels are fought along the front from the Aisne to Flanders.
June 29—Heavy cannonading is in progress north of Arras, particularly near Souchez.