Comment by PeterWhittaker

Exactly! Another, semi-related difference between the cultures: When Alexander chooseEitherOrBothOf(provided instructions, gave orders) during the Sicilian campaign, American generals took them as orders and did them, sometimes to their detriment, while British generals took them as intent/direction, and asked questions.

Eventually, the allies realized they had very different command cultures and learned to work together. It may be that Normandy, et al, would have been far different if they hadn't have figured this out in Sicily.