Originally Posted by spideyboy_1111
that doesn't mean they know everything shield does... the military works with SHIELD, but SHIELD is a higher authority... the military has no control over SHIELD, but Fury can tell the military to stand down. but not vice versa
SHIELD operates in the MCU sort of the way NATO does in the real world. It is an organization operated as an intergovernmental alliance of a number of countries for the protection of the Earth, above any one nation's military. One would assume that individual sponsor governments have representatives on the WSC and thus have access to information on members of the Avengers.