In the sense of a tactical game of SB, it seems perfectly logical that scarce resources like transport move off the board after dropping off the troops for the engagement. Transport units would move off to a safe distance as SOP to await being called back to remove the troops they brought to the battle or to move off to other duties.
After the game clock is completed, if your troops were looking to leave, would the officers not recall the transport and try to get as much of their forces out of the combat zone as they could as quickly as they could? I know this is beyond the scope of the game, but it make sense the transport would not stay 'on map' if the map was 'hot' and risk destruction. What purpose would it serve?
I think it becomes a personal decision. For me I have never considered that the world ended at the edges of the game map. How can one consider the units in a hopeless situation with no retreat because of a map edge? The idea of a force field map edge is gamey to me.
If I can not catch those enemy troops before they leave the battlefield, then I do not deserve any victory points for them. I am glad enough to have chased them off the field freeing up my (pursuit) troops for other duties. In this case the enemy force is now weaker. Those guys which leave the game map are not coming back. That in itself is a bit gamey. After chasing them away, I do not have to guard against their rally and return. A no cost transaction.
There are those who believe as CR posted above that units cannot exit the map to avoid destruction. If it agreed upon before the game starts or if I see the other guy not exiting his troops when pinned to the board edge, (like penned sheep), then I will play that way too with my guys. After all it only a game. And games do have some artificial boundaries.
Strange though, do the units think they want to be destroyed?
Dog Soldier
Fast is fine, but accuracy is everything.
- Wyatt Earp