USA: Only 125 aliens arrested since 6 April.
France: 10,000 Paris clothing workers strike (until May 23) against living costs.
Britain: Appeal for men of 41-50 to volunteer, also coal economy.
Artois: Canadian 44th Brigade regains 300 yds of trenches west of Avion and holds it against repeated German 80th Reserve Division counter-attacks. British attack astride Scarpe captures Roeux (German division fails to retake it until May 14), British cavalry the Farm and Chemical Works.
Western Russia: German officers visit General Dragomirov’s North Front HQ at Dvinsk at his soldiers’ request but with little result. Prince Leopold’s follow-up letter suggesting armistice made a German leaflet (May 29).
Black Sea: Successful Russian submarine Morzh sails on last patrol, mined or sunk by air attack off Bosphorus.
Baltic: Russian Baltic Fleet Central committee meets as ‘Centrobalt’ at Helsinki.