A Fourth Regiment Cocktail combines rye, sweet vermouth, Angostura bitters, Peychaud's bitters and celery bitters with a lemon twist. I garnished with a cherry instead. I got my recipe from Small Screen. The drink dates back to at least 1889.
The flavor is weird. There's a Worcestershire sauce-like taste which I imagine comes from the celery bitters. I wouldn't say I liked this one but it was a worthy experiment.