Cai E (simplified Chinese: 蔡锷; traditional Chinese: 蔡鍔; pinyin: Cài È; Wade–Giles: Ts'ai4 E4; 18 December 1882 – 8 November 1916) was a Chinese revolutionary leader and warlord. He was born Cai Genyin (Chinese: 蔡艮寅; pinyin: Cài Gěnyín) in Shaoyang, Hunan, and his courtesy name was Songpo (Chinese: 松坡; pinyin: Sōngpō).