Analysis by the US Army of the 1939 German campaign in Poland found that "The emphasis which the Germans placed on the development of leadership and initiative in commanders during years of preparatory training brought its rewards in the Polish campaign.
Analyser fra den amerikanske hær af det tyske felttog i Polen viste, at "den vægt tyskerne lagde på udvikling af lederskab og initiativ hos lederne gennem års forberedende træning gav bonus i felttoget i Polen.