Mesopotamia: Dunsterville Mission (200 men and 41 vehicles) leaves Baghdad for Kermanshah (main target Caucasus).
Russia: Bolsheviks sever relations with Rumania, latter’s legation leaves Petrograd on January 28.
Trentino: (Asiago) Sassari Brigade and 4 Alpini battalions surprise attack and recapture Cols del Rosso and d’Echele with Mt Carone (until january 29) provoking 4-division counter-attacks that yield 2,500 PoWs, 6 guns and 100 MGs for 5,240 casualties.
Atlantic: Cunard liner Andania sunk (7 lives lost) by U 46 off North Ireland.
North Sea: Royal Navy Air Service bombs Aertrycke and Engel (until January 28), Coolkerhe (Bruges) airfield bombed on January 29.
France: 6 of 12 DH4s (No 55 Squadron) raid Trier (barracks and railways). French bomb Conflans (RFC bombed on January 5) and Metz.
Germany: Royal Flying Corps Second Lieutenants Scholtz and Wookey (PoWs on October 17, 1917 near Cambrai when shot down in Bristol Fighters) sentenced to 10 years penal servitude for dropping anti-war leaflets behind German lines on Western Front.