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
Sambo (martial art) out of then five) from judo's founder, Kano Jigoro. Spiridonov's background involved indigenous martial arts from various Soviet regions as well as an interest in Japanese jujutsu (though he never formally trained it). His reliance on movement over strength was in part because during World War I he received a bayonet wound which left his left arm lame. Both Oschepkov and Spiridonov independently hoped that Soviet military hand-to-hand combat techniques could be improved with an infusion of the techniques distilled from other foreign martial arts. Contrary to common lore, Oschepkov and Spiridonov did not cooperate on the development of their