KABUL, Afghanistan — The Fatemiyoun Brigade, a militia of Afghan refugees created by Iran to fight in Syria, held a public symposium in the Iranian city of Mashhad in August 2020. According to online promotional material, the conference was held to highlight the group’s “ultimate aim” to “expel US forces from the region.”
To policymakers and analysts in neighboring Afghanistan, the statement hit far too close to home. The country, which shares a 936-kilometer (582-mile) border with Iran, has been the theater of Washington’s longest-ever foreign incursion.
