[aguaviva]

They could have just followed British history and made these countries colonies with an American Viceroy in charge.

They actually floated a proposal along those lines -- a Suggested Post-Surrender Program for Germany, which saw it partitioned into a bunch of de-industrialized fiefdoms, "primarily agricultural and pastoral in its character". However it was tabled after certain negative consequences were predicted to arise as a result, such as some 25 million Germans dying from starvation.

https://en.wikipedia.org/wiki/Morgenthau_Plan