May 30:
Air War: The first Eindekker is shipped to Lt. Otto Parschau for testing. Parschau is serving with Feld-Flieger Abteilun 62 as an instructor teaching new pilots the intricacies of wing-warping. The aircraft is equipped with a Parabellum LMG 14 and carries Parschau's name on the side, as well as the designation A.16/15.
North Sea: Leo Hillebrand, commanding
U-16, torpedoes the Danish freighter SS
Søborg, 2,108 tons, traveling in ballast from Copenhagen to Newcastle. This ends his second war patrol with 4 ships and 4,777 tons.
Aegean Sea, near the Dardanelles: Ernst von Voigt, in
UB-8, Torpedoes HMS
Merion, 19,380 tons, a former passenger liner mocked up to represent the battlecruiser HMS Tiger.