The legendary Trojan War was won with the help of poisoned arrows, in one of the first attempts of biological warfare, according to the first historical study on the origins of bio-terrorism and chemical weapons. "In this celebrated epic poem about noble heroes fighting honorable battles, both sides actually used arrows dipped in snake venom," said Adrienne Mayor, author of "Greek Fire, Poison Arrows & Scorpion Bombs: Biological and Chemical Warfare in the Ancient World" (published this month by Overlook Press). Mayor, a classical folklorist in Princeton, N.J., gathered evidence from various archaeological finds and more than fifty ancient Greek and Latin authors, revealing that biological and chemical weapons — horrible even by modern standards — did see action in antiquity. Toxic honey, water poisoned with drugs, scorpion bombs, chocking gases, conflagrations and incendiary weapons similar to modern napalm were widely used in historical battles. Among victims and perpetrators of biochemical warfare were prominent figures such as Hannibal, Julius Caesar and Alexander the Great."The first place we see the use of any kinds of poisons is in the story of how Hercules, the super hero of Greek myth, slew the gigantic, poisonous water-serpent Hydra. He dipped his arrows in the monster's venom, creating the first biological weapon described in Western literature," Mayor said. The "Iliad" provides several clues to primitive biological warfare. Written about 700 B.C., the poem centers on the war between the Greeks (or Achaeans) and the Trojans, thought to have happened around 1250 B.C.