From the Soldier side: Here’s something you can do if you really want to see a military person get mad at you. Call a Marine (current or former) a Soldier. Call a Sailor a Marine or Soldier. Call an Airmen anything but…etc.
I’ve often heard from somebody I’ve meant or know , tell methat they have a nephew, niece, cousin, etc who’s deployed. I always ask them two questions after they tell me that: 1.) What branch of the service are they in, and 2.) What’s their job?