In Greek mythology, how long did the Trojan War last?

Marcy, I suppose you mean the Trojan war ended when the city of Troy was defeated following a very siege . This happened when the Greeks appeared to sail home leaving a gift of a great wooden horse . The Trojans took this inside the city unaware that Greek troops were hiding inside . After nightfall they emerged and let their comrades, who had feinted a return home but actually sailed back to Troy, into the city

kinda messed up Aphrodite was the one that gifted the kings sister in law. whyd the Trojans pay for it?

Trojan war was defeated coz. of wooden Horse as a gift (but with soldiers inside it) so when the enemy was drunk time to attack