Agent Orange was a potent herbicide and defoliant used across Vietnam during the Vietnam War. Listen to this podcast from HowStuffWorks to learn about Agent Orange and its atrocious legacy.

The first Crusade began in 1095, and launched a struggle for control of Jerusalem in a series of arduous battles spanning more than two centuries. Learn more about the origin, escalation and consequences of the Crusades in this podcast from HowStuffWorks.

During the Cold War, both the U.S. and the U.S.S.R. stockpiled weapons, eventually holding enough power to destroy the world several times over. Yet neither side actually used these weapons. Learn more about M.A.D. in our article on HowStuffWorks.

When the Spanish Coast Guard caught English Captain Jenkins smuggling, they cut off his ear as punishment. Could this insult have sent two countries to war? Check out our HowStuffWorks article to learn whether this is fact or fiction.

Amid the bloodshed of World War I, the Pope pled for a truce on Christmas Day. The commanding powers refused the truce, but soldiers across Europe crossed battle lines to spend Christmas the enemy. Check out our HowStuffWorks article to learn more.

Did Genghis Khan really kill 1,748,000 people in one hour?

Genghis Khan has more death attributed to him than any other person in history. Learn about Genghis Kahn and the siege Genghis Khan conducted on Nishapur.