The Pacific Archipelago is a group of islands located in the Pacific Ocean. It includes Fiji, Tonga, the Marianas, and the Sulu Archipelago. Fiji is an island nation located in the South Pacific Ocean, east of Vanuatu. Tonga is an archipelago located in the South Pacific Ocean, east of Fiji. The Marianas are a chain of 15 volcanic islands located in the western Pacific Ocean, east of the Philippines. The Sulu Archipelago is a group of islands located in the southwestern part of the Philippines.