Answer:
The Trojan Horse
Step-by-step explanation:
Odysseus encountered the Cyclops, Circe, and Calypso in his journey homeward. (The Odyssey) He encountered the Cyclops first, then Circe, and then Calypso.
The Trojan Horse however happened before his journey home, it happened in the fight between Greece and Troy. (The Iliad) It was what the Greeks used to infilirate the walls of Troy.