The United States’ withdrawal from Afghanistan and the Taliban’s return to power were widely described as the end of a twenty-year war. Across the surrounding region, the picture has proved far less settled. Infiltration, cross-border attacks, and armed incursions are now recurring along Afghanistan’s frontiers, affecting neighbors from Pakistan and Iran to the Central Asian republics. Instead of bringing stability, the post-2021 landscape has exposed how fragile Afghanistan’s security environment remains and how easily that instability spreads beyond its borders.

However, this is more visible along the Afghanistan-Tajikistan frontier. Repeated incidents of violence and infiltration have pushed the Russia-led Collective Security Treaty Organization to strengthen Tajikistan’s border defenses, including plans to provide more advanced weapons and surveillance capabilities. The message is clear: instability linked to Afghan territory has not receded since the Taliban takeover. Various analysts argue that it has become more organized.

Events between late 2025 and early 2026 illustrate the shift. On 26 November 2025, a quadcopter launched from Afghanistan’s Badakhshan province struck a Chinese-connected site in Tajikistan, killing three Chinese nationals. Just four days later, on 30 November 2025, a........

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