It depends on the campaign you are in. Do most or all Morrow Project members have a college degree? Was he an officer; if so from the start, he probably entered the Corps after college. If so, did he attend Annapolis, or an ROTC program, etc.? Or
16 years in the USMC, if he graduated at age 22, would make him 38 when he joined the Morrow Project (or more, if he didn't join right away).
An officer leaving at 16 years of service sounds like he was not selected for promotion. This year the USMC announced:
“Effective immediately, Marine Corps policy is to select for continuation only those twice-passed majors and twice-passed captains [with more than 15 years of service] whose continued service is in the best interests of the Marine Corps based on the needs of the Marine Corps.”
http://www.marinecorpstimes.com/arti...ERS/308130027/
Was he in aviation, infantry, etc.? Once you know that, you could pick a few units and look up their history in the period of his enlistment.
Since we know the Project recruited him after lots of background checks, he's presumably "not anything" that would cause the Project to pass him by: famous, married, a criminal, politically undesirable ...
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Michael B.