Quite a long time ago I worked for the US Military in Giessen, an hour's north of Frankfurt selling Harleys and US made Cars to military personnel on their PX Camps. I dealt with all types from full bird Colonels to Private First Class (PFC) soldiers. The little fella above was from Puerto Rico, and I recall he taught me a lesson in paperwork which I was too naive to disbelieve but it was kind of genius.
There's more on this subject from 2009, including how I learned the military are as Kissinger said to General Alexander Hague.