From: east coast, usa
There is a topic for a larger discussion there, but instead let's look at TOAW Rules:
1. A unit Withdrawn will not return, it is gone for good.
2. A unit Disbanded may or may not return.
For , designers make multiple similar units so that, for example, 'LSSAH' can withdraw in 1942 [and by law be permanently out of the game] but then '1.SSLAH' can 'return' in 1943. Same unit to us, but to TOAW it is two completely different units.
For , part A, a unit disbanded by the player will only return if that unit is flagged to Reconstitute. This flag is not available in-game so it has to be in a designer provided doc or briefing, or the player would have to verify the flag in the Editor.
For , part B, a unit disbanded by Event will not return. This event is not visible in-game so it has to be in a News String, in a designer provided doc or briefing, or the player would have to verify the event in the Editor.
Confused? Well, I think it's supposed to be a little difficult to follow, especially for D21/RGW, because the design theory for these two scenarios is that the player should generally not be exactly sure what will happen, as the field commanders also were not sure when what units would come and go from their command. So like other aspects of these scenarios, the player can use the natural blinders, or they can study the Editor and get a little advantage. Its been discussed in other threads - should the experienced/studious be allowed an advantage?