To be forced into service
This is not used in the U.S. military.
Bronetransporter
secured area
It means to be armed
Died While Missing
Extended combat training
north Atlantic treaty organization
It is "Basic Active Service Date"
member of a State national Guard Unit
It means to change direction 180 degrees
They stand for the letters E and W.
If you're talking about military terms, it stands for Letter Of Notification