Perhaps unaware of the gravity of the situation, Haus was notably absent during the July Crisis of 1914. At the crucial crown council of 7 July 1914, where drastic action against Serbia was decided upon, Karl Kailer von Kaltenfels stood in for his chief. Upon the outbreak of war, Haus was named Flottenkommandant (Fleet Commander). When Italy entered the war, Haus sent the battle fleet to bombard Ancona and other Italian Adriatic ports on the night of 23/24 May 1915, but for the most part he left the active fighting to the light forces—fast cruisers, destroyers and submarines.