They've earned our respect, and have been treated like crap. How do we improve our treatment of them?
By not sending them to senseless wars in the first place?
I watched a lot of American veterans docs, and some are quite good, and also amongst what I heard from French soldiers, notably those that did Afghanistan, one of the things that made them suffer a lot beyond all the heavy psychological and physical consequences they can go through, is when most people don't give a f**k or don't understand such or such war, feeling that all what they suffered been useful to...nothing.