The next day, the carrier task force returned to strike Luzon, the same day that elements of Sixth Army went ashore at Leyte; the raids on Luzon continued into 19 October. The landing on Leyte led to the activation of Operation Shō-Gō 1, the Japanese navy's planned riposte to an Allied landing in the Philippines. The plan was a complicated operation with three separate fleets: The 1st Mobile Fleet, now labeled the Northern Force under Jisaburō Ozawa, the Center Force under Takeo Kurita, and the Southern Force under Shōji Nishimura. Ozawa's carriers, by now depleted of most of their aircraft, were to serve as a decoy for Kurita's and Nishimura's battleships, which were to use the distraction to attack the invasion fleet directly.