Tirah, also spelled Terah, also called the Tirah Valley, is a mountainous region located in the Orakzai District and the southern part of the Khyber District, positioned between the Khyber Pass and the Khanki Valley in Pakistan. Due to its proximity to the Afghan-Pakistan border and challenging terrain, maintaining control of Tirah has been historically difficult for the Government of Pakistan. In 2003, for the first time since Pakistan's independence, the Army entered the Tirah Valley.