I'm actually a Legion member. The Legion, of course, is limited as to what information they can provide. In our case, we filled out the forms that we needed to fill out, and Veterans Affairs staff have been helpful in guiding me to the applicable forms that I would need to fill out.
I haven't really had to go to my Legion, although they do know what's going on and they've offered support, but it's Veterans Affairs that I've been mostly dealing with.