Per Djensen’s preview part 3:
Before a power that starts the game “neutral,” like the United States and the Soviet Union, there are a few special rules.
*** Cannot move into or fly over neutral territories.**
* Cannot move into territories controlled by any other power.
* May not use aircraft carriers, transports, naval bases, nor air bases that belong to another power
* Does not block naval movements of other powers and may occupy the same sea zones as another power. USA can be in the same sea zone as UK or even Germany while not at war./li>
* Cannot attack a territory of a power with which it is not at war.
* If a power attacks a sea zone that contains both units from a power with which it is at war and from a power with which it is not at war, the units not at war to not participate in the battle and war will not result.
* Declarations of war must happen at the beginning of the combat move phase before any combat movements are made.
That’s clear enough. :-)
