Western Front
Battle of the Somme: British transport wagons in the mud near Maricourt, Somme:
http://imgur.com/VRDVTr0* © IWM (Q 58341)
French progress in north of St. Pierre Vaast Wood; in Saillisel Germans regain ground.
Eastern Front
Bukovina: Russian general Lechitski success in two passes south of Dorna Watra against Austro-Hungarian troops, but Central Power reinforcements stall the advance.
Fierce fighting south-east of Roter Turm Pass.
Asiatic and Egyptian Theaters
Appointment of General Sir F. R. Wingate as High Commissioner of Egypt.
Naval and Overseas Operations
German auxiliary cruiser
KronPrinz Wilhelm in dry dock after getting hit by a torpedo:
http://imgur.com/x2wYNj2
Mediterranean: UB-43 (Mellenthin) torpedoes and sinks P&O armed liner
Arabic (11 crew lost) off Cape Matapan.
Black Sea: Coastal submarine
UB-45 mined off Varna,
UC-15 also lost to unknown cause in November.
UB-46 mined off Bosphorus on December 7.
East Africa: Affair of Gyuba (Darfur). The forces of Ali Dinar, ex-Sultan of Darfur, who launched a rebellion against the British, are defeated by Sudan force. Ali Dinar killed (see May 22nd).
Political, etc.
Poland: With the proclamation of the Kingdom of Poland, Germany asks volunteers to join the new Polish Army.