The King of Avanti and the King of Vatsa

King of Vatsa loved elephants and had a secret technique for tame them. The king of Avanti is a famously cruel man, constantly pushing on his neighbors to see what he can get. He gets the workman to construct an elephant made of wood and hollow on the inside. Inside the elephant he puts 60 soldiers and he wheels the elephant to a forest that's on the boundary between the two great houses.