Recent Publications - Tag John A. Nagl

Can AI Pass the US Army War College?
April 29, 2026 — The US Army War College oral comprehensive examination serves as the institution’s capstone, measuring its senior officers’ strategic thinking. In early 2026, three faculty panels applied that standard to four leading commercial artificial intelligence (AI) systems: ChatGPT, Gemini, Claude, and Grok. Prompted without core curriculum materials, all four models passed. Unlike static benchmarks, the examination’s impromptu dialogue format revealed meaningful performance differences that were invisible in general-purpose evaluations, with one model performing at a statistically significant advantage. These findings challenge how the Department of War assesses commercial AI for strategic applications and point toward domain-specific, dialogue-based benchmarking as a more rigorous standard... MORE

Parameters Now: Can AI Pass the US Army War College? by Kevin M. Boyce, John A. Nagl, and Kristan J. Wheaton

Book Review: Winning Without Fighting: Irregular Warfare and Strategic Competition in the 21st Century
March 18, 2026 — Winning Without Fighting offers recommendations for the United States’ response to attacks on the rules-based international order. The four authors propose “nothing less than a new grand strategy for America.” The reviewer agrees with some of the authors’ recommendations, while he strongly disagrees with their suggestions on investments... MORE

Cover of Winning Without Fighting: Irregular Warfare and Strategic Competition in the 21st Century

A Long, Hard Year: Russia-Ukraine War Lessons Learned 2023
January 12, 2026 — As the Russia-Ukraine War passed the two-year mark, the conflict ground to an entrenched, apparent stalemate. Nevertheless, the conflict, with a blend of conventional warfare and innovative technology, offers new lessons to the US Joint Force about the changing character of war. From fires to airpower to intelligence, this review of 17 different aspects of the conflict offers insights to prepare leaders for tomorrow’s war... MORE

Slide for A Long, Hard Year: Russia-Ukraine War Lessons Learned 2023

Book Review: Uncertain Warriors: The United States Army between the Cold War and the War on Terror
September 4, 2025 — In Uncertain Warriors: The United States Army Between the Cold War and the War on Terror, author David Fitzgerald looks at the US Army from Vietnam through Iraq, examining how the end of the Cold War, drawdowns, and ideas about cultural inclusion impacted the Army. Reviewer John Nagl recommends it for today’s Army leaders... MORE

Cover for Uncertain Warriors: The United States Army between the Cold War and the War on Terror

“A Long, Hard Year: Russia-Ukraine War Lessons Learned 2023”
December 4, 2024 — In this episode of Decisive Point, authors Michael T. Hackett and John A. Nagl delve into insights from the article “A Long, Hard Year: Russia-Ukraine War Lessons Learned 2023.” They analyze the evolution of warfare tactics between the first and second year of the Russia-Ukraine War, highlighting the shift from rapid maneuvers to trench warfare characterized by saturation and attrition. The discussion emphasizes... MORE

Decisive Point Podcast Ep 5-27: “A Long, Hard Year: Russia-Ukraine War Lessons Learned 2023” | Michael T. Hackett, John A. Nagl

A Call to Action: Lessons from Ukraine for the Future Force
September 29, 2023 — Fifty years ago, the US Army faced a strategic inflection point after a failed counterinsurgency effort in Vietnam. In response to lessons learned from the Yom Kippur War, the United States Army Training and Doctrine Command was created to reorient thinking and doctrine around the conventional Soviet threat. Today’s Army must embrace the Russo-Ukrainian conflict as an opportunity to reorient the force into one as forward-thinking and formidable as the Army that won Operation Desert Storm. This article suggests changes the Army should make to enable success in multidomain large-scale combat operations at today’s strategic inflection point... MORE