Punjab is a region in South Asia. It is divided by the Radcliffe Line: Some parts of it are in Pakistan, and others are in the Republic of India. It is in a plain, with the river Indus flowing through Pakistan. The soil is very fertile. The Indian part of it has the highest income in India, per population. It lives from agriculture. Main religions in the region are Sikhism, Hinduism and Islam. Sikhs have been fighting against Indian rule and are seeking freedom for Khalistan.