Black Sea: Coastal submarine UB45 mined off Varna, UC15 also lost to unknown cause in November. UB46 mined off Bosphorus on December 7.
Eastern Mediterranean: UB43 (Mellenthin) torpedoes and sinks P&O a armed liner Arabic (11 crew lost) off Cape Matapan.
Bukovina: Russian general Lechitski success in two passes south of Dorna Watra against Austrian troops, but Central Power
reinforcements stall the advance.