Military men, huh?
Well, they're most likely gruff and to the point, so there's no need to dance around the issue.
Their first priority will, or at least should be, the saftey of their people.
Try to reaffirm that, to the best of our knowledge, Two was an isolated incident, and that humanity isn't going to suddenly come climbing out of it's tomb and try to exterminate everyone.
However, if they should meet any other Terran ships....