In the autumn of 1381, a Ming army invaded and conquered Yunnan, which was then ruled by the Mongol prince Basalawarmi, Prince of Liang. In 1381, Ma Hajji, Zheng He's father, died in the fighting between the Ming armies and Mongol forces. Dreyer states that Zheng He's father died at 39 while he resisted the Ming conquest, while Levathes states that Zheng He's father died at 37, but it is unclear if he was helping the Mongol Army or was just caught in the onslaught of battle. Wenming, the oldest son, buried their father outside Kunming. In his capacity as Admiral, Zheng He had an epitaph engraved in honour of his father, composed by the Minister of Rites Li Zhigang on the Duanwu Festival of the third year in the Yongle era (1 June 1405).