The Korean martial arts began more than 2000 years ago and have evolved into the modern day fighting techniques of tae kwon do. Tae Kwon Do originated in 37 B.C., during the Koguryo dynasty. The ceiling of a royal tomb contains a painting of two men facing each other practicing tae kwon do. Tae Kwon Do was also practiced during the Silla dynasty (668-935). Tae Kwon Do peaked in popularity between 1147 and 1170. During the latter half of this era, tae kwon do began to decline as a martial art, but survived mearly as a recreational activity. In 1945, after Korea's liberation, a move was made to unify the fighting arts of Korea under one name. Ten years later, the term "tae kwon do" was formally adopted. A demonstration before President Syngman Rhee turned out to be the most important turning point for Korean martial arts. After the demonstration, President Rhee was so impressed he ordered that all soldiers receive training in the martial arts. Jhoon Rhee introduced tae kwon do to the United States in 1956. Mass expansion to the U.S. started in the early 1690's. On Nov. 26, 1967 the U.S. Tae Kwon Do Association was founded.