Episode 127 of the Irregular Warfare Podcast explores the lasting impact of the Global War on Terrorism and what the United States has inherited—militarily, politically, and socially—after twenty years of conflict in Iraq and Afghanistan.

Our guests begin by examining how the U.S. military has historically navigated post-war transitions, particularly following protracted irregular conflicts. They then evaluate the consequences of the post-9/11 wars on the military institution, the broader national security establishment, and American society at large. The episode concludes with a forward-looking discussion about the strategic lessons learned and what they might mean for future great power competition and conflict.

The Honorable Mara Karlin is a Professor of Practice at the Johns Hopkins School of Advanced International Studies. She has held senior national security roles for six U.S. Secretaries of Defense and most recently served as Assistant Secretary of Defense for Strategy, Plans, and Capabilities. Her newly published book, The Inheritance: America’s Military After Two Decades of War, anchors today’s discussion.

Major General (retired) John Ferrari is a nonresident fellow at the American Enterprise Institute. He focuses on the defense budget, reform, and acquisition, and previously served as director of program analysis and evaluation in the Army. Over his 32-year military career, he also served as a strategic planner for Operation Iraqi Freedom and as a deputy commander at the NATO Training Mission in Afghanistan.

Ben Jebb and Alisa Laufer are the hosts for this episode. Please reach out to Ben and Alisa with any questions about this episode or the Irregular Warfare Podcast.

Episode 126 examines the evolution of proxy warfare and hybrid threats in the current security environment. Our guests explore how states increasingly delegate conflict to non-state actors and leverage hybrid approaches to achieve strategic objectives below the threshold of conventional war.

Our guests begin by exploring the conceptual foundations of proxy warfare and how it has evolved from historical conflicts to modern battlefields in Ukraine, Syria, and beyond. They then discuss the integration of hybrid threat tactics—spanning military, political, economic, and information domains—within proxy relationships. Finally, our guests analyze the implications for defense policy, offering insights into how both NATO and EU countries are adapting to counter these complex security challenges.

Dr. Vladimir Rauta is an Associate Professor of International Security with the School of Philosophy, Politics and Economics at the University of Reading. He was a 2023 Non-Resident Fellow with the Irregular Warfare Initiative. Vladimir's research examines the delegation of war from states to armed non-state actors in the contemporary security environment. He has published extensively in journals such as International Security and is one of the editors of the recently published Routledge Handbook of Proxy Wars.

Dr. Teija Tiilikainen is the Director of the European Centre of Excellence for Countering Hybrid Threats. Previously, she was the Director of the Finnish Institute of International Affairs and has served as Secretary of State at the Ministry for Foreign Affairs of Finland. Her extensive policy experience and research on European integration and security policy provide valuable insights into countering hybrid threats in the modern security landscape.

Episode 125 examines the impact of Ukraine's irregular warfare and resistance operations on its broader strategic objectives. Our guests discuss how Ukrainian resistance activities have evolved throughout the conflict and evaluate their strategic importance in the war against Russia.

Our guests begin by describing how Ukrainian resistance and irregular warfare activities developed through different phases of the war, from initial guerrilla tactics during the invasion to the sophisticated long-range attacks within Russian territory. They then assess whether these operations accomplish battlefield effects, their influence on escalation dynamics, and how they shape both Ukrainian and Russian populations' perceptions of the war. Finally, our guests provide insights on the synergy between conventional and special operations forces, the role of technology in resistance, and lessons that can be applied to future conflicts.

Lieutenant General (Ret.) Mark Hertling served for 38 years in the US Army as a tanker and cavalryman, serving at every level from tank platoon leader to Commander of the 7th Army. He retired in December 2012 after serving as the Commanding General of US Army Europe, where he led over 60,000 soldiers and partnered with the armies of 51 nations. LTG Hertling worked with Ukrainian forces as early as 2004 and has extensive experience in military transformation and coalition operations.

Dr. Alexandra Chinchilla is an Assistant Professor of International Affairs at Texas A&M's Bush School of Government and Public Service. Her research examines how powerful states use security cooperation tools to increase their influence over allies, partners, and proxies, with extensive research on the war in Ukraine. She has conducted fieldwork in Ukraine since the full-scale invasion and serves as an advisor to the IWI Special Project on Proxies and Partners.