That's right, pirates. And not the pretty-boy, Johnny Depp kind of pirates, either. These were violent and calculating river pirates — wish-it-was-Deliverance river pirates — and they ruled the Ohio and Mississippi Rivers in the early part of the 19th century.
Referred to as America's first serial killers, the Harpe Brothers were a famous pirate clan led by two cousins (yes, cousins. As if Appalachian family trees aren't difficult enough). Micajah "Big" Harpe and Wiley "Little" Harpe robbed and murdered innocent men, women, and children all along the rivers of Middle America. Micajah was said to be the brawn and Wiley the brains, though they were well-matched in viciousness. Both were known to prefer buckskins and even wore the scalps of their victims at their belts.
These buck-skinned freaks became a menace to all westward migration, but quickly fell to their own stupidity. In a drunken act of mutiny, they beheaded one of their own and attempted to collect the bounty. The cousins were immediately recognized, apprehended, and beheaded themselves.
On the more frilly side of the pirate spectrum is the infamous Jean Lafitte. Lafitte also unburdened many boats of their heavy loads along the Mississippi River like the Harpe Brothers. However, he and his brother, Pierre, had a gentler style. Not that they weren't pirates to the fullest, they just dressed better.
Like any true pirate, Jean Lafitte carried no allegiances to a country. Jean was of French descent but was offered British citizenship to betray the United States during the War of 1812. He helped General Andrew Jackson fend off the British during the 1815 Battle of New Orleans and later spied for the Spanish during the Mexican War of Independence.
Lafitte did all of these things out of pure self-interest, of course, and I can't think of anything more pirate than that, matey.