sentences:  In 1960s and beyond many Sikhs migrated to the UK and North America in search of economic opportunities.Some of the Sikhs who had settled in eastern Africa were expelled by Ugandan leader Idi Amin in 1972.Sikhs are primarily an agrarian community and with the pressures of having only a limited amount of land, high birth rates and the desire to make a better living, the male offspring of Sikh farmers were encouraged to migrate to foreign countries.