If you're interested in delving deeper into what recent medical research has indicated, however provisionally, about PTSD and combat trauma, you might do well to visit this one catcha-all site on the Web, PubMed. PubMed is more tax dollars at work: it's a service of the U.S. National Library of Medicine ("NLM"), and the National Institutes of Health ("NIH"), both part of the U.S. Department of Health and Human Services. (PubMed includes over 17 million citations from MEDLINE and other life science journals for biomedical articles back to the 1950s, often with links to full text articles and other related resources.)
As of just today, searching just got easier -- with the introduction of new technology, that allows for better, more optimized searching of MedLine Plus, an enormous database of medical and health-related articles, MedlinePlus en Espanol, and the entire NLM Library system, referred to above. (Click here to find out more about the new search engine.) In other words, good news for searchers, librarians, and even common folk with access to the Web.
Try doing a search on any of those sites for "PTSD" and/or "combat trauma." Learn a few simple search techniques for better results, too -- most people seem relatively clueless on how to search (and results are only as good and relevant as the way you looked for them.) Here's a "How To" article from WikiHow about "How to Get the Most Accurate Results on Search Engines." It's basic but good. Click here for that link. Here's another one to read after you're done with that. Slightly more in-depth. Between the two, you'll have a better handle on searching. That article is entitled, ""How to Search for Expressions and Phrases in Search Engines." Click here for that link.
(And if you want even simpler suggestions on search -- really basic and foundational -- try these: "How to Search the Internet" and "How to Search Google.") Don't laugh. Many don't know, and the rest of us can always learn more. A good search = good results. Go forth and search!