The Dupuy Institute

Excellence in Historical Research and Analysis

About TDI

The Dupuy Institute is an organization dedicated to scholarly research and objective analysis of historical data related to armed conflict and the resolution of armed conflict. The Dupuy Institute provides independent, historically-based analyses of lessons learned from modern military campaigns.

Trevor N. Dupuy

1916 – 1995

Our institute is named after our founder, Col. Trevor N. Dupuy: a visionary historian and military analyst.

Col. Dupuy was an American military historian and author. He served as a U.S. Army officer and later became well-known for his work in military history and analysis. Dupuy authored numerous books, and developed several quantitative models for assessing combat outcomes and military effectiveness.

TNDM Combat Model

The Tactical Numerical Deterministic Model (TNDM) is an empirically based combat model with a database derived from historical research.

The TNDM is a quick-reaction, inexpensive, computer-assisted mathematical simulation of air-land combat. It is suitable for planning, for analysis, and for examining a variety of combat situations, ranging from a small-unit, low-intensity combat action, to multi-day corps or army conventional battles.


These databases document hundreds of combat engagements across multiple key variables.

Compiled and maintained by military historians, these databases allow a researcher to conduct analysis based on quantitative data.