On April 5, 1892, 52 armed men rode a private, secret train north from Cheyenne. Just outside Casper, Wyo., they switched to horseback and continued north toward Buffalo, Wyo., the Johnson County seat. Their mission was to shoot or hang 70 men named on a list carried by Frank Canton, one of the leaders of this invading force.
The invaders (as they came to be known) included some of the most powerful cattlemen in Wyoming, their top employees and 23 hired guns. The invasion resulted from long‑standing disputes between these cattle barons, who owned herds numbering in the thousands, and small operators, most running just enough cattle to support their families. The event came to be called the Johnson County War. Longtime Wyoming historian T.A. Larson ranked it “the most notorious event in the history of Wyoming.”....
Pictured above, "the invaders", and Nate Champion, who survived a first attack at point-blank range by five attackers in November of 1891. He perished in a second attack on April 9, 1892.
Things Libertarians say: "Government isn't cooperative, government is institutionalized warfare."
There's a particularly good Wikipedia article as well.
h/t Cracked.com which I'm coming to respect somewhat, though less click-baity stuff would be better.