Similiar american movies

Taxi Driver

Public Enemy with James Cagney has a "returning soldier gets sucked into organized crime" theme. I take that back. Cagney's older brother is the returning soldier -- from WWI, wears his uniform all the time... Older brother is OK, Cagney runs wild.

The violence in that movie is so tame by today's standards, it's almost laughable. Makes you wonder what we've become, and where we're headed.