The future of warfare is not a technology problem. It is a decision problem. Yankee Sierra LLC provides the doctrine, frameworks, and advisory capacity to integrate artificial intelligence into command decision-making at every echelon — from strategic headquarters to the execution edge.
The Praxis AI Doctrine — Warfare in the Cognitive Age establishes the theoretical and operational foundation for integrating artificial intelligence into the full spectrum of military decision-making. It is not a technology brief. It is a doctrine — authored by a practitioner, cleared for public release, and grounded in thirty-three years of continuous national security service across every echelon of command.
"The future of overmatch lies not in overwhelming force, but in coherent fusion: humans, machines, and data systems synchronized into an adaptive decision network that can sense, analyze, and act faster than any opponent."
— The Praxis AI Doctrine, IntroductionThe doctrine spans eleven parts — from the collapse of sequential warfare and the architecture of decision webs, to cognitive EW, the logistics of thought, and the human transformation required to build a genuine cognitive force. It is designed for readers across military, government, academic, and industry audiences.
A 20-minute executive presentation derived from the book — purpose-built for senior defense leaders, acquisition decision-makers, and PAE engagements. Available for scheduled briefings.
Request a Briefing →The Cognitive Warfare Operationalization Model is the methodical application layer derived from the Praxis AI Doctrine. It evaluates every capability, investment, and acquisition across four integrated dimensions: domain integration, echelon scalability, warfighting function alignment, and mission area task execution. It is not a briefing — it is an analytical engine for screening high-value defense investments.
The model exposes seams created by stove-piped platforms and applications, and identifies where human-machine integration must be engineered to restore time, tempo, and simultaneity. It has been applied to Army FY26 priorities, PAE alignment, and Division-level proof-of-concept demonstrations.
Applied at the Division level, it provides the culminating proof of concept — where all domains, warfighting functions, and mission area tasks converge into a synchronized human-machine decision web.
The architecture of Cognitive Warfare at Corps level and above: four integrated layers where AI mode and human role are precisely defined, and where toggling AI settings produces measurable changes to decision speed, cognitive load, and synchronization.
Every Yankee Sierra engagement traces directly to the Praxis AI Doctrine and the Cognitive Warfare Operationalization Model. These are not off-the-shelf consulting products. They are purpose-built advisory, assessment, and analytical services derived from frameworks developed in operational headquarters and refined through active engagement with Army acquisition customers.
COL (Ret.) Yi Se Gwon brings thirty-three years of continuous national security experience to every engagement — including thirty years of active Army service and three years supporting the DoD Chief Data and Artificial Intelligence Office, command of a U.S.-ROK Combined Headquarters overseeing more than 500,000 allied forces, and operational leadership of the Global Information Dominance Experiments. His presentations draw on doctrine, operational experience, and a published body of work to move audiences from concept to conviction.
Doctrine without operationalization remains theory. Yankee Sierra partners with organizations that bring the implementation depth, domain expertise, and organizational reach to translate the Cognitive Warfare model into fielded capability across defense customers.
The nation that masters cognitive tempo — the rate at which understanding becomes action — will define the character of 21st century warfare.
COL (Ret.) Yi Se Gwon spent thirty years in active Army service developing that mastery across every echelon of the U.S. Army — then continued as a defense contractor supporting the DoD Chief Data and Artificial Intelligence Office for three additional years, bringing his total national security service to thirty-three years. As Chief of Operations for the Global Information Dominance Experiments, he led the operational integration of AI into joint command and control at a scale few practitioners have experienced. As Chief of Staff for Strategic Operations, he managed the modernization portfolio that funds the very programs he now advises on.
In February 2026, he published The Praxis AI Doctrine — Warfare in the Cognitive Age: a practitioner's framework for integrating artificial intelligence into military decision-making at every level, from strategic headquarters to the execution edge. The book was submitted for prepublication review to DOPSR and approved for public release. It is not a technology brief. It is doctrine.
Through Yankee Sierra LLC, Yi Se translates that doctrine into advisory, assessment tools, and training programs that help defense organizations — military, industry, and allied — move from fragmented point solutions to integrated decision advantage.
Defense sector relationships are built deliberately. Whether you are exploring an advisory engagement, scheduling a speaking inquiry, requesting the Executive Brief, or initiating a partnership conversation — tell us who you are and what you are working on. We will respond within one business day.