Convoy zones/raiding isn’t 100% clear either…
The way im reading into it: You move your ships into a convoy zone during noncombat move (or combat if there are enemy ships). Moving into a convoy zone is a combat move as you are interdicting supplies.
Then that power must either destroy your ships during his turn or lose the extra income. A convoy is like any other seazone for movement purposes. Correct.
Anyways i found it i think…In this scenario USA does not go to full production but gets +25 to income along with dice rolls on their next turn. Correct.
So USA dow on japan but is still rolling dice for income ? Sorry, I read this wrong. USA cannot declare war until it is at full production. Once the die roll plus bonuses from Axis war actions bring the income to 80, USA can declare war. Not before.