Mass-murdering dictators usually aren't born that way. They start as
effective and likeable people, which enables them to win the power
with which they later commit atrocities. Power can teach its wielders
to be capable of callous atrocities.
I have never been particularly impressed by physical courage, and I
don't particularly admire veterans. I feel sorry for today's US
military veterans: they joined the military thinking they would "serve
their country," but instead the US used them to invade and destroy
other countries.
Many of them realized this, and some of them started organizations
against militarism — in effect using their cachet as veterans to
protect others from being swindled as they had been. Those are the
veterans I consider heroes.
When I see organizations promote candidates by saying that they are
veterans, I think, "Is this meant as a substitute for being a strong
progressive champion?"