I have been enjoying reading Those Angry Days, by Lynne Olson. In 1937-1941ish, the United States was embroiled in the debate between those advocating intervention in Europe and those who insisted that America must not be drawn into another European conflict. According to the author, many Americans believed that the United States had been suckered into World War I and that the gathering storm in Europe was a direct result of harsh provisions in the Treaty of Versailles. The mood was essentially that Britain and France had treated Germany poorly at Versailles and that the resulting German aggression was their own fault.
Anyway, Olson mentions that Charles Lindbergh (who strenuously opposed intervention) visited the Luftwaffe in Germany. He was escorted by the US Military Attache in Berlin. There was also a German Military Attache in Washington. While the two countries were not at war (and many Americans sympathized with the German cause), why would they have military guys in each others’ capitals. Both attaches provided important intelligence to their home countries during this time. The German attache (accurately) reported that America was nowhere near a war footing and that Hitler could invade as he pleased without concern for American reprisals. Similarly, the American attached reported that the Luftwaffe was the most superior force in the air and that attacking Germany would be a losing battle.
Why would Germany and the USA allow these guys to roam around?