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
Martial arts calmness, and to benefit the practitioner in different levels: the physical, the psychological and the spiritual. Some martial arts in various cultures can be performed in dance-like settings for various reasons, such as for evoking ferocity in preparation for battle or showing off skill in a more stylized manner. Many such martial arts incorporate music, especially strong percussive rhythms. (See also war dance.) The oldest works of art depicting scenes of battle are cave paintings from eastern Spain (Spanish Levant) dated between 10,000 and 6,000 BCE that show organized groups fighting with bows and arrows. Chinese martial arts originated during