From: east coast, usa
Kinda two things going on. When a unit evaporates it may or may not reconstitute depending on designer settings. Some may, some may not. This isn't displayed anywhere during play, so you have to rely on the scenario briefing to give any clue as to who comes back and who doesn't. Also, reconstituted units usually come back after about 4 weeks, which means in a shorter scenario, you may not see any reconstitute.
Next, when a unit evaporates, a percentage of its equipment goes into the replacement pool. Unless the unit is not in supply at the time, in which case none of its equipment is recovered into the replacement pool.
Any good ? Or still confusing ?