Why in news
On September 24, 2026, Pakistan carried out air strikes on 10 sites in Afghanistan's Kandahar, Paktia and Khost provinces, citing drone attacks from across the Durand Line. Kabul reported four civilian deaths. Afghanistan has never recognised this 1893 colonial boundary.
Why for UPSC
UPSC often tests colonial-era boundaries as a set and the Simla Convention (1914) and Simla Agreement (1972) are a standing confusion trap. Today's Af-Pak escalation brings the Durand Line back into that cluster.
Prelims summary
Durand Line: 1893, Mortimer Durand and Amir Abdur Rahman Khan, about 2,640 km, Afghanistan-Pakistan, never accepted by Kabul.
McMahon Line: Simla Convention, 1914, India-China. Radcliffe Line: 1947 Partition award. LoC: Simla Agreement, 1972.