 After launching the dive bombers that sank "Hermes" and the other ships, the First Air Fleet reversed course and headed southeast for the Malacca Strait and Japan.On 19 April, while transiting the Bashi Straits between Taiwan and Luzon en route to Japan, "Hiryū", "Sōryū", and "Akagi" were sent in pursuit of the American carriers and , which had launched the Doolittle Raid against Tokyo.They found only empty ocean, as the American carriers had immediately departed the area to return to Hawaii.