25th October 1915
Western Front
French troops launch an attack at the Bazancourt-Challerange railroad, in order to straighten their lines in Champagne.
Eastern Front
Furious fighting near Illukst, Uxkull, Lake district and Chartorysk.
Southern Front
Italian Trentino offensice successful.
Serbs fighting Bulgars north of Pirot.
Serbs recapture Veles.
Bulgars retire on Ishtip.
Naval and Overseas Operations
French success at Sende (Cameroons).
James Martin, 14-years-old, dies in Gallipoli due to enteritis. He is the youngest Australian soldier to die in WWI.
Political etc.
Hans Freiherr von Wangenheim, German ambassador to the Ottoman Empire, dies while in office.
Ship Losses:
Selma ( Norway): The cargo ship struck a mine and sank in the North Sea 25 nautical miles (46 km) east north east of North Foreland, Kent, United Kingdom with the loss of nineteen of her crew.
HMS Velox ( Royal Navy): The Viper-class destroyer struck a mine and sank in the English Channel off the Nab Lightship ( United Kingdom) (50°41′N 1°20′W) with the loss of four of her crew.