Abstract amended in January 2024: This paper examines the effect of exposure to extremist ideologies in the home country on the subsequent integration of refugees in host countries. For this purpose, it combines a rich census of Afghan refugees living in Tajikistan in 2023, following the Taliban's takeover in Afghanistan, with uniquely scraped district-yearly data on the territories controlled by the Taliban, U.S. allies, and contested territories between the two factions between 2017 and 2021. The empirical strategy compares the integration outcomes of refugees who experienced varying exposure to extremism generated by the exogenous and sudden dramatic shift in Taliban's territorial control in their province of birth between 2017 and 2021. Findings suggest that refugees who were born in provinces with increased Taliban territorial control between 2017 and 2021, despite having comparable pre-migration characteristics to refugees born elsewhere in Afghanistan, are less integrated into their Tajik host communities than the other refugees. These refugees also show lower educational levels and more mental health problems.