[Charles Martel]

I wonder if anyone has ever a done a study of wars and resultant impact on public morality?

If families are disrupted, and men are thrown together away from their homes and relatives, does that create some kind of negative social impact later?

I'm not sure if it has been studied in any "official" manner, but the presumption has long been that lengthy military deployments are morally challenging.

To use an example from the era of the Napoleonic Wars, I believe it was Admiral Lord Nelson who once remarked that "every sailor is a bachelor when beyond Gibraltar."

[Erasmus]

"
Ship me somewheres east o' Suez
Where the best is like the worst
And there ain't no Ten Commandments
And a man can raise a thirst
"

--Rudyard Kipling, The Road To Mandalay

If you haven't done it, check out the YouTube video of Lawrence Tibbett singing the Olney Sparks setting of this poem.