Not all bands took part in Traoré's roots revival. Les Ambassadeurs du Motel formed in 1971, playing popular songs imported from Senegal, Cuba and France. Les Ambassadeurs and Rail Band were the two biggest bands in the country, and a fierce rivalry developed. Salif Keita, perhaps the most popular singer of the time, defected to Les Ambassadeurs in 1972. This was followed by a major concert at which both bands performed as part of the Kibaru (literacy) program. The audience fell into a frenzy of excitement and unity, and the concert is still remembered as one of the defining moments in 1970s Malian music.