Looking at the cards for the US.
Monroe Doctrine
The USA may declare war on any major power that declares war on/Attacks any zone in the Western Hemisphere. (N. America or S. America inclusive of Islands.)
Looking at Neutral card:
Monroe Doctrine
An attack by any Nation anywhere in North or South America violates the Monroe Doctrine and allows the US to declare war on the Attacker.
Definition of declaring war:
Declaring War: Declaring war is initiating war, meaning that the player declaring it is starting the war. Players may sometimes declare war in response to being Attacked but this is not technically a declaration of war per the rules as war was already declared by the Attacker.
So while a nation can declare war at any point even during another players turn, I am interpreting for the Monroe Doctrine to end up applying some one has to actually attack a country in N/S America. From reading those three things it seems to me that it does require the Soviets to land a piece to declare war/attack.
Which means USSR would have to launch by July 36 to even reach a territory in S. America roughly using movement rates. In addition to using up its entire starting capital Jan 36 to place a transport.
Then again by using the same rules on the nation sheets if the Soviet Union initiates War with a nation known to be protected under the Monroe Doctrine it is in effect initiating war with the US knowing it will force them to declare war on the Soviet Union.
Which the Sleeping Bear rule on Soviet sheet means they do not get go to full production…since they initiated the whole series of events knowing what treaties where in place. On top of that it says the US MAY declare war. Not that it has to. I am not sure it would be in the best interest of the US to allow USSR getting into full production since it is now a hostile player to US interest. At least that is how I would play it.
So even if I was wrong and USSR could just say I declare war on Uruguay. The earliest they could attack anyways is Jan 39 meaning the earliest the US income increase would be July 39 where they could use the IPCs for equipment after collecting it at the end of Jan 36.
Definitely a rule I wouldnt allow in a two player game. Might start being fun in a three or five player game though.
As a US player Id wait to declare the counter war and look at western USSR and staging base potential for the eventual clase with Japan.
Of course I havent played the game yet just putting armies together and reading the rules a few times through.
EDITED to get rid of the question marks replacing quotation marks. Have to remember those dont seem to translate…