How wartime observers compared amphibious theatres

What might veterans of the Italian, Normandy, and Pacific landings have learned by comparing notes?

The wartime services already pursued that comparison through observers who travelled between theatres and compiled amphibious best practice in archival reports.

A wartime observer travelled between theatres to collect amphibious best practice. The resulting archival account compared Pacific landings, Mediterranean experience, and Normandy instead of relying on veterans meeting after the fact. The ADM records therefore preserve evidence of deliberate cross-theatre institutional learning.