Western Front
British troops in camouflage snow suits leaving their trench for a night patrol:
http://imgur.com/cd5IpM7* © IWM (Q 6423)
British wiring party setting up barbed wire at Cambrai:
http://imgur.com/2jp101Z* © IWM (Q 6419)
Captain C.F. Collet of the Royal Flying Corps becomes the first British service flyer [as opposed to balloon crew] to make parachute jump when he uses a Calthrop 'Guardian Angel' parachute for an experimental jump from 600 feet.
Eastern Front
Baltic Provinces: Battle of the Aa: Germans again repulsed near Kalutsem.
Dobruja: Germano-Bulgarians repulsed east of Focsani.
Romania: Battle of Pralea (until January 18): Rumanians hold Susitza valley.
Asiatic and Egyptian Theaters
Arabia: Abdulla’s 5,000 Arabs capture Mecca-bound Turk convoy (much gold), reach Wadi Ais, 50 miles northwest of Medina on January 19.
Naval and Overseas Operations
Black Sea: Russia claims that its naval raid on the Anatolian coast sunk 40 Ottoman ships that were carrying food to Constantinople.
North Africa: Italians severely defeat rebels near Zuara (Tripoli).
Political, etc.
United Kingdom: The British government raised £100 million from the public for its new war loan.
Responding to German criticism of the Allied blockade as inhumane, Britain states Germany starved Paris during the Franco-Prussian War.
Italy: Vatican confirms that Pope Benedict will not participate in any action towards peace that might appear to favor one power over the other.
Romania: US and Dutch Ambassadors leave Romania.
United States: Leon Trotsky lands in New York.