HMAS Perth was one of three modified Leander-class light cruisers used by the Royal Australian Navy (RAN) during the early part of World War II. She was built for the Royal Navy (RN) in the mid-1930s and was commissioned as HMS Amphion in 1936. The ship spent the next several years as flagship of the Commander-in-Chief, Africa before she was transferred to the RAN in 1939 and renamed as HMAS Perth.