Italian troops with a captured Austrian machine gun during the Seventh Battle of the Isonzo. Image courtesy Italian Army Historic Photogallery.
- The Seventh Battle of the Isonzo begins as Italian troops launch a short, concentrated attack on Austro-Hungarian positions near the Isonzo River in north-eastern Italy. Italy sustains 17,000 casualties during the four day battle, Austria-Hungary 15,000
- British forces storm German trenches along a 1km front to the south-east of Thiepval
- British troops gain ground towards Machukova in Macedonia
- Bulgarian troops occupy Kavalla in Greek Macedonia
