27th May 1916
Western Front
Battle of Verdun: French take trenches south-west of Mort Homme.
Southern Front
Austrians take Monte Moschicce (north of Asiago) by storm.
Asiatic and Egyptian Theatres
Russian troops repel an Ottoman attack from Mosul, Iraq with the use of bayonets and a cavalry charge.
Naval
German submarine SM UC-3 hits a mine and sinks off the coast of Belgium with all hands. It was responsible for sinking 22 ships.
Political, etc.
Declaration of M. Sazonov on the alliance and Russian aims.
Speech by President Wilson on the War. Wilson administration gives up plans to make the U.S. Navy second in the world behind Britain, as it would cost too much.
Death of General Gallieni.
Ship Losses:
Lincairn (United Kingdom) The collier struck a mine laid by
UC 10 (Alfred Nitzsche) and sank in the North Sea 8 nautical miles (15 km) north by east of the Shipwash Lightship ( United Kingdom) (52°08′N 1°53′E). Her crew survived.
Mar Terso (Italy) The cargo ship was sunk in the Mediterranean Sea off the Balearic Islands, Spain (39°08′N 5°02′E) by
SM U-39 ( Kaiserliche Marine). Her crew survived.
Moravia (Italy) The cargo ship was torpedoed and sunk in the Mediterranean Sea.
Trunkby (United Kingdom) The collier was shelled and sunk in the Mediterranean Sea 50 nautical miles (93 km) south by east of Port Mahon, Spain by
SM U-39 ( Kaiserliche Marine). Her crew survived.
SM UC-3 (Kaiserliche Marine) The Type UC I submarine struck a mine and sank in the North Sea off Zeebrugge, West Flanders, Belgium with the loss of all eighteen crew.