[everyone]

"while we increasingly knew how practical it was"

Whose we?

[jbay808]

Thanks for asking this. I do find a lot is written about WW2 as though the audience is assumed to not include Germans. Similar thing happens for many other historical events to other groups.

[dfrage]

The Allies, more specifically the U.K. and the US, and the Soviets through their pervasive spying. I changed the original.