5th June 1918
Western Front
Near Vingre (north-west of Soissons) German attempt to cross Aisne checked.
German attacks at Longpont (north of Forest of Retz) and at Chezy (south of Ourcq) defeated by French.
Sir W. R. Robertson appointed to command of British home forces.
Aviation
Douglas Campbell, the first American to become an ace while flying for an American-trained unit, scores his sixth and final victory. Badly wounded during the flight, he sees no further combat.
Political, etc.
Britain, France, and Italy announce that they are committed in creating an independent Poland that has free access to the seas after the war.
Speech of Count Tisza in Hungarian Diet re: Dual Alliance extension.
Madsen machine-gun debate in House of Commons.
General Robertson Commander in Chief Home Defences.
Ship Losses:
Anton (Sweden) The wooden barque was sunk in the North Sea 24 nautical miles (44 km) west south west of the Lindesnes Lighthouse, Norway[18] by
SM U-80 ( Kaiserliche Marine). Her crew survived.
Argonaut (United States) The cargo ship was sunk in the Western Approaches (49°12′N 6°45′W) by
SM U-82 ( Kaiserliche Marine). Her crew survived.
Harpathian (United Kingdom) The cargo ship was torpeoded and sunk in the Atlantic Ocean 80 nautical miles (150 km) off Cape Henry, Virginia by
SM U-151 ( Kaiserliche Marine). Her crew survived.
Polwell (United Kingdom) The cargo ship was torpedoed and sunk in the Irish Sea 3 nautical miles (5.6 km) north east of Lambay Island, County Dublin (53°33′N 5°55′W) by
SM U-96 ( Kaiserliche Marine). Her crew survived.
HMS Snaefell (Royal Navy) The armed boarding steamer was torpedoed and sunk in the Mediterranean Sea 240 nautical miles (440 km) east-southeast of Malta by the submarine
SM UB-105 ( Kaiserliche Marine). Her crew survived.
Vinland (Norway) The cargo ship was sunk in the Atlantic Ocean 50 nautical miles (93 km) off Cape Henry (36°32′N 73°58′W) by
SM U-151 ( Kaiserliche Marine). Her crew survived.