@AndrewAAGamer said in Global 2nd edition Q+A ( AAG40.2):
A destroyer accompanies the transport to the sea zone and due to the destroyer the Attacker chooses to ignore the sub and picks up the ground troops and then moves the transport away to land the troops elsewhere.
This sounds like a misunderstanding: You don’t need the Destroyer to support the Transport when loading, here.
The requirement of the presence of a warship is only given in case of offloading for an amphibious assault, page 16, Europe 1940.2 rulebook:
“However, a transport is not allowed to offload land units for an amphibious assault in a sea zone containing 1 or more ignored enemy submarines unless at least 1 warship belonging to the attacking power is also present in the sea zone at the end of the Combat Move phase.”
Your scenario is addressed on page 13, Europe 1940.2 rulebook:
“Enemy submarines and/or transports do not block any of your units’ movement, nor do they prevent loading
or offloading in that sea zone (with one exception; see “Special Combat Movement: Transports,” page 16). As
the moving player, you have the option of attacking any enemy submarines and/or transports that share a sea zone
with you. However, if you choose to make such an attack with a unit, that unit must end its movement in that sea
zone, and it must attack all such units present. In other words, you must either attack all enemy submarines and
transports in the sea zone, or you must ignore all of them.
You may not attack some enemy units and ignore others in the same sea zone. It is possible that some of your units
may stop to attack while others continue moving through the sea zone.”
So resolving your scenario is not a question of a time sequence but of simultaneous Combat Moves.
Transport and Destroyer enter the seazone in question at the same time. The Transport loads and continues its move while the Destroyer stops. The fact that the Destroyer stops there during Combat Move Phase leads to an attack during Conduct Combat Phase (page 13, too):
"However, units can’t end their movement in friendly spaces during the Combat Move phase except in four instances.
…
- Units moving into a sea zone containing only enemy submarines and/or transports in order to attack those
units. (Remember that such a sea zone is not considered hostile.)"