The Battle of Savo Island, also known as the First Battle of Savo Island and, in Japanese sources, as the First Battle of the Solomon Sea (第一次ソロモン海戦, Dai-ichi-ji Soromon Kaisen), and colloquially among Allied Guadalcanal veterans as The Battle of the Five Sitting Ducks, was a naval battle of the Pacific Campaign of World War II, between the Imperial Japanese Navy and Allied naval forces.