The Battle of Savo Island, also known as the First Battle of Savo Island and, in Japanese sources, as the , 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. The battle took place on August 8–9, 1942 and was the first major naval engagement of the Guadalcanal campaign, and the first of several naval battles in the straits later named Ironbottom Sound, near the island of Guadalcanal.