A Zeppelin raid on Scotland and England: the Zeppelin L20, returning from this raid, is wrecked off Norway.
May 3 (Wed.)
Verdun:—Fresh German attacks on the Mort Homme begin.
May 4 (Thur.)
Germany, in a Note to the U.S.A., agrees to sink no ships without warning (see April 19).
The Zeppelin L 7 is destroyed off Schleswig by the gunfire of British warships.
May 5 (Fri.)
Verdun:—Fierce fighting for Hill 304.
A Zeppelin is destroyed near Salonika.