Under a fleet reorganisation in May 1912, "Zealandia" and all seven of her sisters (, , , , , , and ) were assigned to form the 3rd Battle Squadron, part of the First Fleet, Home Fleet. The squadron was detached to the Mediterranean Sea in November because of the First Balkan War (October 1912 – May 1913); it arrived at Malta on 27 November and subsequently participated in a blockade by an international force of Montenegro and in an occupation of Scutari. The squadron returned to the United Kingdom in 1913 and rejoined the Home Fleet on 27 June.