John Spencer — The Paradox of the Urban Character of Modern Conflicts

Why It Matters

Urban conflict is rising as cities dominate the global landscape; mastering urban warfare reduces civilian harm and preserves strategic legitimacy.

Key Takeaways

• Urban warfare’s three‑dimensional terrain complicates military operations
• Civilian presence forces strict adherence to distinction and proportionality rules
• Militaries avoid urban battles, yet preparation reduces civilian harm
• Historical case studies guide modern doctrine and training priorities
• Urban environments act as equalizers for asymmetric combatants

Summary

John Spencer opened the session by framing urban warfare as a paradox: militaries instinctively avoid fighting in cities, yet the increasing urbanization of the globe makes such conflicts inevitable. He highlighted his decade‑long research, fieldwork in Ukraine, Israel, Gaza, and Iraq, and his role in shaping doctrine at West Point and the Modern War Institute. Spencer defined urban warfare using the U.S. "urban triad"—population, infrastructure, and built‑up terrain—and explained why this environment is uniquely challenging for both attackers and defenders.

The core of Spencer’s argument is that the physical complexity of cities—subterranean networks, high‑rise structures, and dense civilian populations—creates a three‑dimensional battlefield that nullifies many conventional advantages. He cited historical examples, from the World‑II Battle of Aachen to the 1993 Battle of Mogadishu, to illustrate how even well‑trained forces struggle to achieve rapid, low‑casualty outcomes without dedicated urban training. The speaker emphasized that the law of armed conflict, especially the Fourth Geneva Convention, imposes strict limits on force, further complicating operational planning.

Spencer underscored the importance of rigorous historical analysis and comparative case studies to inform current doctrine. He described his podcast as a research tool that brings together commanders, smart‑city experts, and scholars to refine tactics. By recounting his own experience commanding the 2008 Battle of Sadr City and later documenting it, he illustrated how firsthand insight can correct doctrinal myths and improve civilian‑harm mitigation strategies.

The implication for policymakers and military leaders is clear: investing in urban‑warfare training, doctrine revision, and interdisciplinary research will reduce protracted sieges and civilian casualties. As the world becomes more urban—over half the global population now lives in cities—failure to adapt will exacerbate humanitarian crises and erode strategic legitimacy.

Original Description

A globally recognized expert on Urban Warfare, John Spencer will explore the history and evolution of urban warfare, including military strategy and tactics, the law of armed conflict, and civilian harm mitigation. His work includes cutting-edge field research into ongoing or recently concluded wars and battles from Nagorno-Karabakh, Ukraine, Israel, to Gaza.

John Spencer is an award-winning scholar, professor, author, combat veteran, national security and military analyst, and internationally recognized expert and advisor on urban warfare, military strategy, tactics, and other related topics. Considered one of the world’s leading expert on urban warfare, he served as an advisor to the top four-star general and other senior leaders in the U.S. Army as part of strategic research groups from the Pentagon to the United States Military Academy.

Spencer currently serves as the Chair of Urban Warfare Studies at the Modern War Institute at West Point, Co-Director of the Urban Warfare Project, and host of the Urban Warfare Project podcast. He also serves as the Chair of Urban Warfare Studies with the Madison Policy Forum, a New York based think-tank. He is a founding member of the International Working Group on Subterranean Warfare.