|The British liner Hesperian, torpedoed and sunk today by the German submarine U24 off Ireland.|
- After two revisions, General d'Urbal of 10th Army submits today a plan to Foch that is acceptable to the commander of the Army Group of the North. Along the thirty-two kilometre stretch of the line held by 10th Army will be deployed six corps, four of which are to make the primary attack north of Arras, and two a supporting attack south of the city.
- On the Eastern Front the German 8th Army captures the fortress of Grodno, between Vilna and Bialystok. Further south, Austro-Hungarian forces have been battering against the Russian defensives along the Sereth River to no avail; in just four days of marching and combat, the Austro-Hungarian IV, XIX, and V Corps have suffered eight thousand casualties. Moreover, supply problems bedevil the Austro-Hungarian formations, who report being short of ammunition and food. Finally, dysentery and stomach flu claim numerous victims in the terrible conditions.