1. I would warn him to cease hostilities. I would likely tell him that his actions are inflicting with the construction of the FOB and ask command to send down more plasteel. I would inform him that the plasteel is on the way, and to wait for it. If he continued to attack me, I would subdue him and warn MPs.
2. I would have to be in proximity with them for a while. I'd have to "read their body language" and slowly hear the repetitiveness of different sounds until my Synth was able to piece together their form of communication. Kind of difficult to explain.
3. I would inform the aCO that calling for distress and initiating SD isn't a good idea for whoever might come to assist and advise him to choose one. I am not obliged to stay behind to fight off the invasion because I must self-preserve and am not combat oriented, but I would continue to assist anyone needing help to evac. This question was tricky for me, so props to you. Let me know if I've answered incorrectly, cause I'm not 100% sure I understood.
I didn't answer the evac part because I'm confused what you mean. Did the aCO tell me not to call evac? Or not to evac after it's been called?