To be honest with you, I only had one LOR from an Air Force Col. Other than that, I only put the names of several individuals on that pre-application paperwork (8 references, etc.) Those people included an Air Force Lt. Col, two University profs. former co-workers/managers, school principal, etc. I was selected with an air contract. In my personal opinion, I don't think having a bunch of Officers writing you LORs will be that beneficial to you. The Marines do use the whole person concept and you don’t get a lot of variety from only having Officer LORs. If you don’t know any military people don’t worry about it. What about college profs., coaches, supervisors, community leaders, anyone in a respectable position that knows you well and can comment on your overall person will do fine.