Why did Gandhiji launch satyagraha at Ahmedabad in 1918? What was the outcome of Gandhiji's satyagraha at Ahmedabad?

Gandhiji led the mill-workers of Ahmedabad in a strike against the mill-owners who had refused to pay them higher wages. When the workers seemed to weaken, he provided support to them by undertaking a fast (hunger strike). Afraid of the consequences, the mill-owners agreed on the fourth day of Gandhiji's fast to give a 35 per cent increase in wages.