Ross Island

Ross Island is a island on Earth formed by three volcanoes in the Ross Sea by Antarctica, off of the coast of Victoria Land in McMurdo Sound. Historically, Ross Island has been a part of the Sub-Antarctic Islands and overseen by New Zealand.

It is home to three volcanoes, Mount Bird, Mount Terror and Mount Erebus, with the latter being the southernmost volcano on Earth.

Human-Covenant War
Ross Island was the location of a fierce battle between UNSC and Covenant forces during the Battle of Earth. The engagement took place at one of the island's volcanoes, Mount Erebus, where three SPARTAN-IIs from the Blue Team prevented a Covenant excavation operation.