As the Mughal empire began to decline , the Nawabs grew in power , although nominally sub-ordinate to the Mughal emperor , they yielded great power in their own right and became independent for all practical purposes .
As the Mughal empire began to decline , the Nawabs grew in power , although nominally sub-ordinate to the Mughal emperor . 
 They yielded great power in their own right and ruled the '' subah '' as independent rulers for all practical purposes .