The Bowie.
According to legend-
It was fashioned by a blacksmith at the request of Col. James Bowie after he had to fight a bear when his rifle malfunctioned. No other knife on the market at the time could be used to fight, pry, dig, chop, slash, and cut all with the same knife, so Jim Bowie had one made. The blade was long and wide with a sharpened clipped point, a brass blade catcher on the spine and a long full guard. The knife proved its worth at many fights, one of which was to be known as the Vidalia Sandbar Fight, where a shot and stabbed Bowie went on to kill all five of his attackers with his knife.
Bowie later fought at the battle of the Alamo, along with Davy Crockett and a band of Texans fighting for Texas' independance from Mexico. All of the Texans died in the battle. Bowie fought to the end, with a pistol in one hand and his famous knife in the other.
A more American story you couldn't find.