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
Infighting (martial arts) Infighting (martial arts) Infighting is the name given to certain martial art techniques used while in close proximity to the opponent. The Chinese martial art of Wing Chun specializes in infighting. The key points of infighting are the control of the enemy's angle of attack, i.e., to control and limit the ways or angles through which an opponent may find an opening in one's guard to counterattack or get past a block or guard. This is attained by controlling the opponent's attacking limb, transferring momentum and debilitating his stability by forcing his posture/position and shifting his mass on his center