sentences:  Tanh's elder brother, Võ Nhàn, was a follower and a general of Đỗ Thanh Nhơn, an officer in the Nguyễn army.In 1781, when Đỗ Thanh Nhơn was assassinated by his own leader, Nguyễn Ánh, Võ Tánh and his brother, Võ Nhàn, revolted and occupied Hóc Môn, a village on the northern outskirts of Saigon.Afterwards, the rebels moved to Gò Công and built their base there.