The' Iron' War Knife is the unlockable close-ranged weapon of the Apache and is unlocked by hacking down the pig carcasses the the Apache's arcade mode. Its range and attack power are both superior to that of the stone knife and almost as fast. A single 4-hit combo from this weapon is enough to kill any unarmored opponet and critical injure armored ones.
Iron knives would have been captured from Europeans, Americans, or Mexicans. As such, they would have been about 8'' long, straight, and thin for maximum slashing ability.