Ghandi marched in south africa for what reason

 Within three years of his arrival in South Africa, Gandhi had become a political leader, providing hope to many Indians who had no political rights under the dispensation of the time. In 1903, he founded a newspaper, the Indian Opinion, in which his ideas on passive resistance or Satyagraha were spread. Some years later, an act was introduced in which all Indians in the Transvaal were required to carry a pass. Under Gandhi's leadership, 3000 Indians protested against the law by refusing to register for their passes