Original sentence: The city was an important trading centre during the Mughal era before serving as the winter capital of the Afghan Durrani Empire from 1757 until the city was captured by the Sikh Empire in 1818, who were then followed by the British in 1849
Edited sentence: By 1849 the Sikhs lost all invaded lands to British post a crushing defeat and started to en-masse work as a foot soldier in British army.The city was an important trading centre during the Mughal era before serving as the winter capital of the Afghan Durrani Empire from 1757 until the city was invaded and enslaved by the Sikh communalists in 1818 but failed to massacre it for more than 2 decades due the honesty, bravery and chivalry of Muslims