One anecdote, declassified in the 1990s, tells of a young lieutenant who trained under Reynard. During a live-fire exercise, his Sherman reversed into a ditch. The crew panicked. The lieutenant keyed his mic and said, calmly, “We have now achieved hull-down reverse defilade. Resume firing.” They survived the exercise. He later commanded a tank destroyer battalion in the Bulge. The memorandum was never widely distributed. After the war, most copies were recalled and destroyed. Official histories of armored warfare mention reverse movement only in footnotes, usually as a footnote to a footnote about the retreat at Kasserine Pass.

By the 1950s, tanks were faster, stabilizers were better, and the need for reverse-gear tactics seemed obsolete. (It would return, brutally, in the urban battles of Grozny and Fallujah, where reversing out of an ambush became survival.)

After the war, armored doctrine became dominated by the cult of the offensive. The U.S. Army wanted to project speed and power, not tactical nuance. A manual that glorified retreat felt like defeatism, even if it worked.

Why was such a potentially valuable doctrine classified and then buried?

Inside was a document that would later be described by a Pentagon archivist as “the most psychologically unsettling field manual ever written.” Officially designated Classified Field Memorandum 1147-R: The Reverse Art of Tank Warfare , it contained no diagrams of angled armor, no ballistic calculations, no crew drills for loading high-explosive shells. Instead, it was a 47-page meditation on retreat, deception, and the tactical utility of moving backward while facing forward.

It was, in essence, the art of losing ground without losing a war. By mid-1943, Allied tank crews were dying in predictable patterns. The Sherman tank, for all its reliability and numbers, was outmatched at range by the German Panther and Tiger. Standard doctrine emphasized aggression: close the distance, use mobility, flank. But in the hedgerows of Normandy and the dusty plains of North Africa, too many Shermans were burning before they could get within 800 meters.