[DoodleDawg]

These detachments guard the classified spaces and are responsible for classified material destruction in the event of an occupation.

Occupation by whom? Does this have any purpose other than annoying China?

[Freeport]

Occupation by anyone; from an employee gone nuts to an assault external to the compound. Embassies around the world have detachments. Most countries operate this way in order to protect classified/sensitive information within their facilities.

As an example the British, French, Russian, Chinese, Venezuelan, Cuban, et. al., have military detachments at their missions at the U.N. for the same purpose.

I get the feeling this is new information to you?

[MeganC]

“Does this have any purpose other than annoying China?”

As if annoying China isn’t a pretty good reason unto itself.