Twelve German submarines were officially reported captured or sunk in British waters by American or British destroyers during the month of April, and two others were known to have been destroyed.
Ten passengers were killed when the French steamship Atlantique was torpedoed in the Mediterranean early in May. The ship managed to reach port.
CAMPAIGN IN WESTERN EUROPE
April 18—French advance on both banks of the Avre River between Thanne and Mailly-Raineval; Germans deliver terrific assaults upon the British front from Givenchy to the neighborhood of St. Venant.
April 19—Italian troops reach France; British beat off assaults on Mont Kemmel and recover ground west of Robecq; bombardment of Paris resumed.
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.