Following the Fall of Nanjing, the Imperial Japanese Navy Air Force launched long-distance pre-emptive strikes from newly captured airbases in Nanjing against targets in Nanchang, including the primary Chinese Air Force base at Qingyunpu. Despite heavy losses of many of the Chinese Air Force's top veteran fighter pilots and most of the equipment over the course of the Battle of Shanghai, Battle of Taiyuan, and Battle of Nanjing, the Chinese Air Force was revitalized through the Sino-Soviet Non-Aggression Pact, and the Chinese pilots along with the Soviet Volunteer Group of pilots continued to put up resistance in the air over Nanchang as the Japanese continued to bomb and soften the defenses there.