Western Front
Battle of the Somme: NZ troops take ‘Cough Drop Alley’ and a section of Flers line. British 1st Division captures ‘Starfish Trench’.
French gunner loading a Cellerie mortar at the instruction camp at Bitry:
http://imgur.com/KAxLSop* © IWM (Q 93191)
Spahi cavalrymen of the French Army watering their horses at Cayeux:
http://imgur.com/QnMbc9x* © IWM (Q 78958)
Battle of Verdun: French take trenches south-east of Thiaumont Work and over 100 prisoners.
Eastern Front
Brusilov Offensive: Brusilov offensive comes to an end with around 500,000 Russian casualties and claimed 1,325,000 Central Powers casualties:
http://imgur.com/cTuKYtI
Transylvania: Romanian left held up near Vulkan Pass (south of Petrozseny). Fighting in Kealeman and Gorgeny mountains, Romanians taking prisoners.
Southern Front
Macedonia: Allies pressing along the roads north of Florina.
Serbians within sight of Monastir.
Naval and Overseas Operations
North Sea: German warships capture SS Colchester (Dutch convoy straggler) and take her into Zeebrugge.
Mediterranean: German submarine destroyed at Hagios-Kosmos (east of Phaleron, Greece). [Note: I can find no information about this claimed loss.
http://uboat.net/wwi/fates/losses.html doesn’t list it.]
Political, etc.
France: General Pierre Georges Duport gazetted Chief of the Staff, staff attached to Ministry of War.
Australia: Australian Parliament passes a conscription bill on its third reading by a vote of 47 to 11.
Norway: Premier Knudsen of Norway reveals Norway signed a treaty with Sweden in 1914 to never war on each other.