The history of Sikhs in Afghanistan goes back about two centuries. In the 1970s they are thought to have numbered about 200,000, with most living side-by-side with other communities in cities like Kabul, Jalalabad and Kandahar and involved in the fabrics and clothing business.
But the population is now thought to number less than 5,000. After the Soviet invasion in 1980, a great number migrated to India. A second phase of migration took place after the fall of communist government in 1992. And during the civil war that followed, Sikh business and homes were occupied. They were forced to leave the country with other minorities, including Hindus.
During the Taliban era, Sikhs gained some independence. However, they were forced to wear yellow patches in order to be "recognised or differentiated" from other Afghans.
with thanks : BBC : LINK : for detailed news.