“Bonaparte Crossing the Rhine” is pretty common Ador hornpipe at Irish sessions in the US. Across the pond it’s played in Edor and called “Napoleon Crossing the Rhine.” It’s also known as “Listowel Hornpipe” and “(Farewell) Sweet Killaloe” in areas of New England. It has many other names as well, but most refer in some way to the petite Emperor who championed the metric system, universal property rights, as well as heralded the nation-state.
Unfortunately, there are a number of other tunes which also share in some of these names, so beware of assuming a too close connection between titles and referents to avoid confusion. For instance there’s an Old Time tune, prevalent on Youtube, called “Bonaparte Crossing the Rhine” that is in D, and has nothing in common with our tune. On the other hand, a quick look at Andrew Kuntz’s site reveals that the Old Time tune “Bonaparte Crossing the Rocky Mountains” has the same A part and a very similar B part to our tune here. However, it’s played as a breakdown (i.e., up tempo reel) — the vast majority of Old Time tune are reels or waltzes (as is also true in Bluegrass). Also, it is presented in the key of C as it skips the sole F#. However, it resolves on an A note and Am chord. I’d argue the tune is actually still in Ador, it just doesn’t have a 6th scale degree.
At any rate, our hornpipe here is in O’Neill’s 1850 (1903) under this same title, but as a march — it would be an infantry march, of course, which does seem apropos. The A part is said to be much older than the B part, and it is often claimed to be the predecessor of many other tunes and songs. In other words, it is the progenitor of a family of melodies we might call the “Bonaparte Crossing family.” In Irish sessions “Bonaparte Crossing the Rhine” is played AABB.
For the ABC click Bonaparte Crossing the Rhine
Bonaparte Crossing the Rhine, slow tempo (mandolin)
Bonaparte Crossing the Rhine, med tempo (mandolin)