Sources Used: http://en.wikipedia.org/wiki/Turtle_ship http://en.wikipedia.org/wiki/Battle_of_Sacheon_(1592) http://en.wikipedia.org/wiki/Battle_of_Noryang http://en.wikipedia.org/wiki/Battle_of_Dangpo http://en.wikipedia.org/wiki/Yi_Sun-sin http://www.theartofbattle.com/battle-of-sacheon-1592.htm
