25 worst military decisions ever made

Overconfidence, carelessness, and momentary mental breakdowns can have pretty bad consequences in every day life. Imagine for a moment though what sort of catastrophes they can lead to on the battlefield. With millions of lives on the line one little mistake can literally change the world. From Word War II to Thermopylae these are the 25 worst military decisions ever made and how they affected the course of history.

 

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Video erroneously claims that the English defeated the Spanish Armada in 1158.  Wrong by multiple centuries, or more precisely, 430 years. The Spanish Armada was a fleet assembled and dispatched by King Phillip II of Spain in attempt to invade England in 1588. (thanks Scott Grannan)