This question has to do with multi-national forces.
The scenario is as follows:
The Allies are about to invade Denmark via an amphibious assault. Conducting the assault are UK battleships, cruisers and several UK infantry, artillery and tanks. However, the transports that are carrying the UK land units are American. The UK land units loaded onto the US transports during the previous turn and they are now in position to offload from the sea zone adjacent to Denmark.
In response to the attack, W. Germany has scrambled three fighters.
The questions are, can the UK land units offload from a US transport during the UK amphibious assault? Also, can the German fighters attack the UK fleet AND the US transports?
The question arises because naturally one cannot attack simultaneously with multi-national forces, only defend. In this instance, the UK units are on a US transport, so can they be part of the attack by offloading from the transport after sea battle is resolved even though it belongs to the US?
And since the German fighters are technically defending, can they - by virtue of sinking the UK surface warships first - also sink the US transports? Or are the US transports not considered part of the attack since multi-national attacks aren’t permitted and therefore the German fighters cannot hit them?