PEACE OF BUCHAREST BETWEEN RUMANIA AND CENTRAL POWERS: Bulgaria gets all land lost in 1913, Central Powers to control Danube estuary, 1/3 Army to be demobilized at once; indefinite military occupation (Mackensen C-in-C in May 11).
Heavy rain on Flanders, Artois and Somme fronts. Canadian Corps withdrawn into reserve (until July 15); 5,690 casualties since March 21 although only Canadian Cavalry Brigade in major battle.
USSR: Sidney Reilly (MI1c) arrives in Moscow and tries to see Lenin.
Mesopotamia: General Cayley occupies burning and famine-stricken Kirkuk (until May 8), 600 Turks sick and 3 damaged planes taken but evacuated with 1,600 refugees (May 11-24) due to supply difficulties.