Vovinam to demonstrate Vovinam publicly in Hanoi with his disciples in 1940, Nguyễn was invited to teach the art at Hanoi's Ecole Normale, and Vovinam gained in popularity. During the following years, political unrest increased throughout Vietnam; due to the system's nationalist political orientation, the art came under suppression. By 1954, Nguyễn had emigrated to South Vietnam, where he was able to continue to teach and establish Vovinam schools. After his death in 1960, Grandmaster Le Sang continued the development and international promotion of Vovinam until his own death on September 27, 2010. The first Vovinam school outside of Vietnam was
Lê Sáng Lê Sáng Lê Sáng (1920 – September 27, 2010) was the Chairman of the Vovinam Vietnamese Martial Arts World Federation, a position he held from 1960 until his death. Le Sang was born to Le Van Hien (also known as Duc Quang) (1887–1959) and Nguyen Thi Mui (1887–1993). He was sickly as a child, which made it difficult for him to walk. His mother advised him to study martial arts in order to strengthen his legs. In Hanoi he learned Vovinam at Nguyễn Lộc's Vovinam school. Soon Le Sang was a teacher himself and, together with Nguyễn Lộc, continued to