 Her air group was initially intended to consist of eighteen Mitsubishi A5M ("Claude") monoplane fighters, twenty-seven Aichi D1A2 ("Susie") Type 96 dive bombers, and twelve Yokosuka B4Y ("Jean") Type 96 torpedo bombers, but the A5Ms were in short supply and Nakajima A4N1 biplanes were issued instead.On 25 April 1938, nine A4Ns, eighteen D1A2s, and nine B4Ys transferred to Nanking to support forces advancing up the Yangtze River.The air group advanced with the successful Japanese offensive, despite the defense by the Chinese Air Force and the Soviet Volunteer Group; it was transferred to Wuhu in early June and then to Anqing.