What do you mean? I don't know what specifically triggered it--presumably doing a lot of missions and stuff. Are you implying there's a way to prevent any alien retaliation at all?
1) have had the same vanishing soldier problem on one float terror mission in particular. 3 guys in 3 turns, corpses found, aliens nearby who presumably shot them out of camera angle. 2) Base Defense: when ship approaches, my base defense screen (where Plasma Defense et al. normally pop up and list their firing results) still pops up even though I have no base defense modules. This seems buggy, and is kinda annoying 3) my MAJOR issue: alien ships keep coming to kamikaze my base with no chance of defense on my part. I didn't shoot him down, so it seems unfair. Please tell me there's a way to disable this feature by INI or hex edit. Thanks for a wonderful mod.