Multinational Forces: Transports belonging to a friendly power can load and offload your land units. This is a three-step process:
1. You load your land units aboard the friendly transport on your turn.
2. The transport’s controller moves it (or not) on that player’s turn.
3. You offload your land units on your next turn.
Unloading in an enemy territory occurs in your scenario in US’ combat move phase, followed by the battle.
Unloading in a friendly territory occurs in US’ NCM phase.
Yes France has to fall turn 1 because otherwise the UK can renforce it. That means more losses turn 2. Its also one less turn Germany has to deal with the UK before America and Russia get into it.
Its like asking “Would it be crazy to leave the UK with a fleet after turn 1?”
Thats also yes…might as well conceede the game at that point.
There was an area called the Black Zone where land based planes could not patrol due to range, however when they developed longer ranged aircraft the German subs had nowhere to hide.