Tran Van Soai, also known as Nam Lua, was a Vietnamese general and the commander-in-chief of the armed forces of the Hòa Hảo.

Hòa Hảo is a Vietnamese new religious movement. It is described either as a syncretistic folk religion or as a sect of Buddhism. It was founded in 1939 by Huỳnh Phú Sổ (1920–1947), who is regarded as a saint by its devotees. It is one of the major religions of Vietnam with between one million and eight million adherents, mostly in the Mekong Delta.