When, according to legend, a Trojan Horse was used to help win a war, which two armies were fighting, and what is the current name for the country where this war occurred?

The legendary Trojan War was a conflict fought between a coalition of Greek kingdoms, often called the Achaeans in ancient texts, and the inhabitants of the fortified city of Troy. According to the myths, the war began after the Trojan prince Paris abducted Helen, the wife of a Greek king, leading to a massive decade-long siege of the city by the united Greek armies.

After ten years of fighting with no clear victor, the Greeks devised a cunning plan to finally breach the city's defenses. They constructed an enormous wooden horse and left it on the shore, pretending to sail away in defeat. The Trojans, believing the horse was a victory offering to the gods, brought it inside their city walls. That night, Greek soldiers hidden within the horse emerged, opened the gates for their returning army, and brought about the fall of Troy.

This epic tale, immortalized in works like Homer's Iliad and Virgil's Aeneid, is set in a real-world location. The ancient city of Troy was situated in a region once known as Anatolia. Today, the archaeological site widely accepted as the historical Troy can be found in the northwestern corner of the country of Turkey, near the Aegean coast.