One minor thing, I had in her background that Sarah isn't eligible for promotion on account of being PES and flagged for loyalty issues. Otherwise her rank would have been specialist (assuming we're still going by American ranks) as a medic.<br/><br/>Supposing Warren got permission from higher up the food chain, maybe he could promote her to specialist. Though that might get his own loyalty called into question. Given her relative lack of combat experience (and lacking any leadership experience outside of medical situations) sergeant seems a bit much regardless.