It's not exactly a historical blunder, except in it's portrayal, and that's the Boston Tea Party.
Your text book and your teachers would have you believe that it was this noble, patriotic act of rebellion against an unjust monarchy. How dare they make us pay more for our tea?! It's a cool little fabrication that gets the juices flowing, right?
In fact at the time, the principle method of importing tea into the colonies was through unlicensed smugglers, undercutting the price of tea imported from Britain through the East India Trading Co. The Tea act, which most children are lead to believe was a tax hike on British tea, was actually a price reduction ( as well as eliminating some of the middle men EIT had to go through to get it state side), all in an effort to stay competitive with the smugglers.
It's true that people did dress up like Native American and throw a shit load of tea overboard, but the people weren't colonists, but smugglers sending a message to Britain. The message? "Don't fuck with our tea, you wankers!"
SO yeah, the Boston Tea Party is a sham kids.