"Attempts to prohibit the use of particular weapons in warfare have been made in various civilizations over a long period of time....[I]n ancient times, the Laws of Manu (the greatest of the Hindu codes prohibited Hindus from using poisoned arrows; and the Greeks and Romans customarily observed a prohibition against using poison or poisoned weapons. During the Middle Ages the Lateran Council of 1132 declared that the crossbow [was prohibited.]"