The Allies' most visible demonstrations of wartime capacity

What was the Allies' biggest material demonstration of strength against the Axis in the Second World War?

Mulberry harbours, brewery ships and the volume of new warships are suggested, with the atomic bomb added as an especially dramatic example.

Mulberry harbours and brewery ships made Allied industrial capacity visible through conspicuous support for the fighting forces. Sheer construction volume is another example. A recalled anecdote sets a Japanese claim to have sunk a destroyer against roughly six American destroyers commissioning that day, though the dates and figures are not checked. A panel contribution adds the atomic bomb as the most dramatic demonstration. The discussion also questions how much the Axis understood about Allied production rates, since a display only communicates power when an opponent recognizes what it means.