Isonzo: Italians fail to break through at Krn until June 4. Austrian XV Corps counter-attack between Tolmin and Karfreit until June 4, called off after heavy losses. Cividale Alpini Batallion climbs Sleme massif only to be repulsed by Austrian avalanche of stones.
Galicia: Only 3-mile corridor links Przemysl after Austro-Germans break in from north and southwest. Germans check Russian blow at Austrian Fourth Army until June 4.
Turkey: Allied blockade of Asia Minor formally declared.
North Sea: Harwich Force cruisers (seaplane each) on anti-Zeppelin patrol without success; though twice bombed vainly by German seaplanes.