This song is about the fall of Troy in Paris' view.
The song title, "the third tempation of paris" means the third godess(aphrodite out of Athena and hera) that promised him the most beautiful woman on earth. Which Paris steals Helen, she who is the most beautiful, from Menaleus. The "thousand sails approching is Greek who comes for Helen and to destroy Troy. The storms arrising is Posidon who was against Troy.