The Oceania Cooperative Union (OCU) is a supernation that consists of Australia, New Zealand, a number of countries in Southeast Asia, and some Pacific islands. The headquarters of the supernation is in OCU Australia. The bloc, which was created in 2021 out of another ASEAN-type organization called the Bangkok Economic Block, also has partial occupation of Huffman Island, which the USN also occupies as well. This island in the Pacific Ocean holds much significance in terms of natural resources, which has led to two major wars with the USN.
Although regarded as an equal to the USN in many aspects, the OCU suffers from civil strife. Cambodia and Laos were the first to rebel with the creation of an independence alliance as depicted in Front Mission 5. Bangladesh (after a name change to the People's Republic of Alordesh) was the next member to revolt, which is expanded upon in Front Mission 2. The OCU has been struggling to maintain unity since the events of the coup in Alordesh, the rebellions in Cambodia, and numerous civil disputes in other member-nations such as OCU Philippines. The OCU nearly broke up during an attempted coup in Japan, but this was cancelled upon news that Okinawa was invaded by the DHZ military in Front Mission 3. However it wasn't meant to last and Japan broke away from the OCU (As seen in the canon story line of Front Mission 3) and joined the USN. As of 2171, Japan is still a member of the USN.