Let's face it, there weren't all that many heroines in WWI, or even WWII for that matter. Yes, there were the WACS, but women were kept away form combat.
None the less, many were heroic on the home front, and married the returning doughboys, some of whom were addicted to morphine. Many returning soldiers were indeed addicted to their heroines, and pampered them the rest of their joint lives.
Some of these doughboys were addicted to various forms of opium pain killers taken from their injury, including heroin . . .