Who started the Trojan war?

There are two possibilities for your answer. One, Helen of Troy started the war by running way with Paris, or her husband, Menelaus started the war in retaliation.... he wanted his wife back.

According to legend, it began due to a dispute between three goddesses: Hera, Aphrodite and Athena for the possession of the "apple of discord" on which the word "fairest" was written. To judge them, Zeus instructed the young prince of Troy - Paris.