This book recounts the history leading to the 1893 Durand Line Agreement between Ameer Abdur Rahman of Afghanistan and British Indian official Sir Henry Mortimer Durand to establish a frontier between Afghanistan and British India. The account continues to the independence of Pakistan in 1947, when the demarcation became a source of tension between Pakistan and Afghanistan, and the way the dispute has unfolded since the return of the Taliban in 2021. This book is unique in that it contains all the maps exchanged in Kabul in November 1893, while primary data have been extensively used to explain the real and true perspective of this border. The author has also cited relevant international laws to establish the Durand Line as the legal and perennial border between Pakistan and Afghanistan.