Why was Germany not more prominent during WWII (but apparently during WWI)?
In the beginning of WWII (not sure exactly till which years but at least 39-41), the US only fought in Europe via pilots (the UK greatly lacked pilots), and transport boats. The ground troops only arrived before D-Day at which point the US did get [more] involved in the WWII in Europe.
[1] https://en.wikipedia.org/wiki/Neutrality_Acts_of_the_1930s#E...