One that just made me smile a bit, rather than really bothering me: "Gunsmoke" was set just after the civil war. One of the older actresses, cast as a toothless, feisty old female recluse, came riding across the prarie in her buckboard singing "Strawberry Roan".
On the off chance that anyone here doesn't know, Curley Fletcher wrote "Strawberry Roan", probably just as a poem originally, in or about 1913.