USA: Wilson subscribes $10,000 to Liberty Loan.
Austria: Emperor Charles promises more liberal post-war constitution.
Germany: 118,000 (79,000 women, youths or old men) civilians now in military agencies but still 260,000 troops at home or in occupied territories.
Britain: May bread consumption reported 10% below February.
Flanders: Artillery duels round Ypres and Wytschaete (daily until June 5).
Aisne – Mutiny in French 77th Infantry Division (until June 6): 150 men of 157th Light Infantry Brigade and 97th Infantry Regiment detained and disarmed. In almost unique incident light infantry of 60th Brigade refuse to move into line to support Moroccan Division, disciplinary measures taken.
Western Front: Royal Flying Corps casualties since April 27 are 361.
Britain: CIGS chairs home air defence conference, 24 trained anti-aircraft observers to be transferred from France to serve in lightships, but Field Marshal French writes to War Office that too few aircraft available.