@MightyPol:
Allright, but the US can and it is encouraged to go in South America?
I told you to read the sidebar of Page 15 of the Europe 1940 manual. It’s very clear that a power that is not at war (that begins the game neutral) cannot move land or air units into neutral territories (first sentence under “Movement:”)
And in the Pacific, they cannot go anywhere?
As you said, NAVAL units (including fighters on carriers) can go anywhere on the Pacific board that is not adjoining a Japanese controlled territory. LAND and AIR units can only park on USA controlled territories before the USA is at war with an Axis power, and this applies to both Europe and Pacific halves.
USA cannot even move into Canada until at war with the Axis.
Note that USA can move to zones such as Z54, but cannot use the Allied naval base until USA is at war. So you could get to Australia from Hawaii in one move using the Hawaii naval base, but you can’t get back to Hawaii from Australia in one move (can only move two spaces from Z54) until the USA is at war. This has tripped me up before - I move to 54 thinking I can get back to 26 in one turn but I can’t.