In at least two incidents in late December and early January, Afghan Taliban soldiers intervened to block an ongoing Pakistani project to erect fencing along the shared border between Afghanistan and Pakistan — the demarcation of which prior Afghan governments have never accepted. Despite attempts to resolve the issue diplomatically, and the Taliban’s dependence on Pakistan as a bridge to the international community, both sides remain at odds over the fence. USIP’s Richard Olson, Asfandyar Mir and Andrew Watkins assess the implications of this border dispute for Afghanistan and Pakistan’s bilateral relationship and the region at large.