He was always proud of the fact that he had more combat time in Burma than any other American, and received decorations for service or valour from the U.S., British, and Chinese governments.

After the war Dupuy served in the United States Department of Defense Operations Division[4] from 1945 to 1947, and as military assistant to the Under Secretary of the Army from 1947 to 1948.

[5] Dupuy was a member of the original Supreme Headquarters Allied Powers Europe (SHAPE) staff in Paris under Generals Dwight D. Eisenhower and Matthew Ridgway from 1950 to 1952.

In this work Dupuy discusses the world's major and minor military conflicts from the dawn of history to the present day.

Entries are arranged chronologically and by region, and most of them give little more than the names of the commanders and (often) very rough estimates for the size of the forces involved in the campaigns.

Dupuy began the academic phase of his career in 1952, when Harvard University appointed him as a Professor of Military Science and Tactics in the ROTC program.

Dupuy killed himself by gunshot at his home in Vienna, Virginia on June 5, 1995; he had learned three weeks earlier that he had terminal pancreatic cancer.