The heart attack gun fired a dart made of frozen shellfish toxin that would enter the target's bloodstream and kill them in mere minutes without leaving a trace.

William T. Anderson became known as the deadliest Confederate raider of the Civil War after perpetrating several horrific massacres in Kansas and Missouri.

After a life of petty crime and several attempts to go straight, Buck Barrow joined up with Bonnie and Clyde for just four months before he was mortally wounded by a gunshot to the head.

At its peak in the 1950s and '60s, the kuru epidemic nearly decimated the Indigenous Fore people of Papua New Guinea.

As a member of the French Resistance, Marcel Marceau first developed his miming skills to keep children quiet while they evaded Nazi patrols on their way to the Swiss border.

In 1800, Gabriel Prosser recruited 2,000 people for Gabriel's Rebellion in Virginia, which was set to be the first large-scale slave revolt after the American Revolution.

In the 18th and 19th centuries, the Ashanti Empire ruled over much of modern-day Ghana — and tirelessly fought back against British colonization.

For centuries, Japanese samurai adhered to bushidō, a strict code of honor that emphasized loyalty and honor to country and family. And it still influences Japanese culture today.

During Operation Gladio, the CIA was so desperate to thwart the spread of communism that it partnered with everyone from right-wing terrorists to the Vatican to the Mafia.

Born John Wilson Vermillion, “Texas Jack” rode with Wyatt Earp on the legendary lawman's Vendetta Ride of 1882 — and became one of the most fearsome gunfighters of the Old West.

General Roméo Dallaire's peacekeeping mission in Rwanda ultimately failed when the United Nations ignored his warnings about the coming genocide in early 1994.