I know my particular region has been separated for different treatment, but a Lt Col wouldn't get you through the front door to meet the commander of the national army/navy/air force and thereby quickly resolving military/diplomatic issues. I suspect it is the same throughout much of the world. If you need a favour from a friendly country, it pays to have the right contacts within the ruling bodies (including the military), otherwise we may as well put the Harriers back on the carriers!