The attack on the lighthouse is an operation to find and bring Atlanna back to Atlantis, which was ordered by Orvax.
After searching for a long time, the Men of War soldiers finally tracked down Atlanna at Thomas Curry's residence and ordered her to return with them to Atlantis. Atlanna, however, refused and attacked the soldiers. She managed to defeat them with help from Thomas.
"Ride ain't over yet!"
―Cyborg[src] This article section is incomplete and requires expansion.
Fearing for Thomas and Arthur's safety and knowing that it won't be the last time the Men of War would look for her, Atlanna decided to leave them and return to Atlantis.