You've heard of US military tragedies like Pearl Harbor and Custer's Last Stand, but arguably the worst defeat on a US army force is so unknown that it doesn't even have a name. Most call it St. Clair's defeat, named after the general who lost 1/3 of the US's standing army in a single morning. We call it Battle of the Wabash, named after the river where a smaller Native American force wiped out an American encampment on November 4, 1971.

Britain's introduction to "modern" warfare came a few years before World War I against an unlikely foe: farmers on horseback. Except these farmers geniusly employed smokeless powder, machine guns, and trenches. The farmers were called Boers, and 3,500 of them fended off 21,000 British troops at a small river crossing in South Africa called Colenso.

Simon Bolivar is known as The Liberator of South America, but on a hot summer morning in a sleepy Venezuelan village he nearly lost his entire revolution, and possibly the freedom of a continent. Moments from defeat, Bolivar was saved by an unlikely ally: British veterans of Waterloo.