A somewhat drifting comment about the US Cavalry "Fiddlers Green" in the DT - with its note "as far as we can tell, immediate post-Civil War".

I'd suspect it's a good bit later than that. It sounds very reminiscent of Kipling, towards the end of the century. I'm not suggesting he wrote it, but rather that whoever wrote it had read Kipling.

Particularly the last verse -

And so when man and horse go down
Beneath a saber keen,
Or in a roaring charge or fierce melee
You stop a bullet clean,
And the hostiles come to get your scalp,
Just empty your canteen,
And put your pistol to your head
And go to Fiddlers' Green.

Which echoes Kipling's:
When you're wounded and left on Afghanistan's plains,
And the women come out to cut up what remains,
Jest roll to your rifle and blow out your brains
         An' go to your Gawd like a soldier.

(The Young British Soldier)

If the Cavalry Fiddler's Green is indeed "immediate post civil war", of course, it might have been the other way round, with Kipling's poem being the echo...