Australia

Australia (オーストラリア) is a country consisting of the mainland of the Oceanian continent and several smaller islands.

Background
An Academy City cooperative institution is present in Australia and operates a mass driver.

Toaru Majutsu to Kagaku no Ensemble
The mass driver at the cooperative institution is used to send a biopod to Academy City, with the city using Debris Storm in an attempt to shoot it down.

Toaru Majutsu no Index Light Novel Volume SS2
On the Second Friday of October, when the Sisters were dispatched to destroy the facilities of the Gemstone Mining research organizations around the world and rescue the gemstones imprisoned there, Misaka 17009 was sent to the UMA Ability Clarification Club in Sydney, Australia. During her progress report, she mentioned that she had just confirmed an escape route and was leaving the facility with the Gemstone.