The Kashmir Issue is one that is complex. It can be traced back to the time of partition.
With the end of British rule, conflicts emerged between the Hindus and the Muslims, with the latter wanting a separate country of their own.
After the Partition in 1947, Pakistan emerged as a Muslim-dominated country while India emerged as a secular, democratic country. The province of Kashmir, situated at the border of the two countries, got tangled and entrapped between them.
Today, POK, PoK, or Pakistan-occupied Kashmir, in India remains the portion of Kashmir under the Pakistani administration.