The Afghanistan-Pakistan border is a 2,430-kilometer-long international boundary that separates Afghanistan from Pakistan. This border, known as the Durand Line, was established in 1893 and has been a source of tension between the two countries due to its historical and political implications. The region surrounding the border is characterized by rugged terrain, including mountains and valleys, which makes it difficult to patrol. It is home to various ethnic groups, including the Pashtuns, who live on both sides of the border. The area has also been a focal point for conflict and security issues, particularly related to militancy and cross-border movements.