Trịnh lords
Fearing a war on two fronts, Nguyễn Nhạc sent Hoàng Ngũ Phúc a proposal that if the Trịnh lords recognized the Tây Sơn Rebel Army, the Tây Sơn would help the Trịnh lords fight against the Nguyễn Lords. The proposal was accepted, and Nguyễn Nhạc was made an official of the Trịnh lords. Nhac also made peace with the Nguyễn lords, causing Tống Phước Hiệp to take off the pressure, and deluded Prince Nguyễn Phúc Dương. His diplomacy provisionally made Tây Sơn's enemies inactive and bought him valuable time to shore up his army.