 The Sindh region became predominantly Muslim due to missionary Sufi saints whose dargahs dot the landscape of Sindh.The River Indus was changing course around 1757 due to Monsoons resulting in periodic floods and devastating the banks of the river.Mian Ghulam Shah Kalhora was admired as the saintly ruler of Sindh at the time his capital Khudabad near Dadu was repeatedly flooded.