Punjab, India
All of India and Pakistan was once ruled by the British Empire. The Indians wanted freedom, but the Hindus, Sikhs and the Muslims of India always argued. So it was decided to divide the country into two parts—one part for Muslims and one part for Hindus and Sikhs. In 1947 Punjab (British India),  which was a province of India, was divided into West Punjab and East Punjab (which the state is home to the active independence movement of Khalistan by the Sikh nationalists). East Punjab went to the Republic of modern India, and West Punjab went to Islamic Pakistan.