Western Front
Battle of the Somme: French gain new group of houses in Sailly-Saillisel.
French gunners loading a 65 mm mountain artillery gun in Alsace:
http://imgur.com/rzzJSId* © IWM (Q 108324)
Eastern Front
Romanians maintain positions at Rucar, but retreat in the Gyimes Pass (Mold.); enemy penetrate eight miles into Romania and reach Agas, 8 miles inside frontier, but Austrians beaten in Uzul Valley (and on October 27).
Russian attacks against Lemberg (Lvov) fail to break through, and a German/AH counterattack north of Korytnitsa nets 2 km of trenches and 1900 prisoners.
Southern Front
Macedonia: Fighting in Dobropolye region (north of Kaymakchlan).
Italy: Italians capture Tooth of Pasubio (Trentino).
Asiatic and Egyptian Theaters
British raid and take Dakhla oasis (175 miles south-west of Asyut).
Naval and Overseas Operations
Adriatic: Italian
SS Bermuda rams and sinks Austrian
U-16, after latter sinks Italian destroyer
Nembo off Albania.
Political, etc.
United States: Margaret Sanger establishes the first birth control clinic in the U.S. in NYC (her organization later evolves into Planned Parenthood).
China: German envoy Hentig enters, returns home (arriving June 9, 1917) via USA.