I've always been amazed at how well Germany managed to keep a functioning railroad system despite overwhelming Allied air superiority. Youtube is full of videos of Allied fighters disabling locomotives, often with violent steam explosions. I say this from the point of view of an American who...
When General Doolittle took over the Eighth Air Force, and General Kepner took over 8th Fighter Command in January 1944, they imposed a new policy allowing fighters to attack ground targets of opportunity after their escort leg. I've always thought the significance of this change never was fully...