Galicia: Austro-Germans shell Przemysl forts; American cameraman John A Everets films it.
Flanders: German attack at Hooge.
Artois: French gains near Souchez.
Southeast Cameroons: 400 France-Belgians take river Monjo position until June 1.
Lake Nyasa – Sphinxhaven Raid: 2 Royal Navy steamers land 180 men of King African Rifles on east side of lake. They storm the fort and blow up stern off gunboat Hermann von Wissmann.
Adriatic: Italians first time bomb Pola.
Ireland: Casting vote vetoes Irish volunteers‘ immediate revolt proposal.