Iran is directing a proxy military campaign to contain Turkey's growing economic, political, and security influence in Iraq. Iranian leaders consider Turkey's expanding reach to be a threat to Iranian national security, and Tehran is trying to contain Turkish activity without inciting overt state-on-state conflict. Nevertheless, divergent Iranian and Turkish threat perceptions could lead to miscalculations by either side. On this episode of Overwatch, Nicholas Carl, a senior analyst and the Iran team lead at the Critical Threats Project, and Ezgi Yazici, a Turkey researcher at ISW, discuss these mounting tensions and what they mean for US national security.