As far as I know, and I may be wrong, the only assets owned by the UN, is a building in New York City, which seems to be funded, for the most part, by US taxpayers.
A NATO Task Force is certainly a good idé.
Sorry. I just have no love for the UN, and would prefer them/it to quietly "ride off into the sunset" never to be heard from again.
Oh! Most of the supplies coming in by sea will be on danish ships (MAERSK).
They work very closely with the US government.
(The US Merchant Marine is, for all practical purposes, nearly extinct).
http://www.maersklinelimited.com/aboutus_flagfleet.php