April 20--Germans hurl force against American and French troops at Seicheprey and get a grip on the town, but are driven out; Belgians give ground temporarily near the Passchendaele Canal, but regain it; British re-establish their positions in Givenchy-Festubert region. April 21--British drive Germans from some of their advanced positions near Robecq; Americans retake Seicheprey outposts. April 23--British gain ground east of Robecq and in the neighborhood of Meteren. April 24--Germans take Villers-Bretonneux, but are repulsed at other places south of the Somme; Franco-American positions at Hangard shelled. April 25--British recover Villers-Bretonneux; French and British lose ground in the Lys salient before terrific German assaults from Wytschaete to Bailleul, aiming at Mont Kemmel; Germans take Hangard. April 26--Germans take Mont Kemmel and the villages of Kemmel and Dranoutre and push on to St. Eloi; French recover part of Hangard. April 27--British and French troops recover some of the ground lost in the Bailleul-Wytschaete sector; Germans repulsed at Voormezeele after hard fight. April 28--Germans take Voormezeele, but are driven out by counterattack; Locre changes hands five times. April 29--Germans make heavy attacks upon the entire Franco-British front from Zillebeke Lake to Meteren; British hold their line intact; French yield some ground around Scherpenberg and Mont Rouge, but later regain it; Belgians repulse attacks north of Ypres; Americans take over a sector of the French line at the tip of the Somme salient. April 30--French recover ground on the slope of Scherpenberg and advance their line astride the Dranoutre road; positions of the allied forces push forward between La Clytte and Kemmel. May 1--Americans repulse attacks in the Villers-Bretonneux region; Béthune region bombarded. May 3--French and British improve their positions along the Somme River southward to below the Avre; French take Hill 82, near Castel, and the wood near by. May 4--Germans repulsed at Locon; French make progress near Locre, and British advance near Meteren; Americans in the Lorraine sector raid German positions south of Halloville and penetrate to third line; French shell disables last of German guns that have been bombarding Paris. May 5--Franco-British forces, in operation between Locre and Dranoutre, advance their positions on a 1,000-yard front to an average depth of 500 yards; Germans foiled in attempt to occupy former American trenches in the Bois Brûlé. May 6--Germans launch heavy gas attacks against American troops on the Picardy front. May 8--Germans gain a foothold at several points midway between La Clytte and Voormezeele, but are repulsed at other points along the line; Australians advance 500 yards near Sailly and 300 yards west of Morlancourt.