Where Is It?

[L Verge]

I don't have the faintest idea where this is, but the rifle over the mantel seems to be the one distinct feature of the room as well as the participants being military.

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If the rifle is the clue, I am going to guess that it is a Kentucky longrifle. That could place this scene in Pennsylvania, where the rifle was manufactured in the 18th century, or in Kentucky where it got its name, OR, do we want to really stretch and say that the rifle was what Thomas Lincoln used to kill the Indian?