US Marines in M99 Urban and M81 Woodland during the Battle of Brisbane (July 3 - 8, 1999) during the Operation Peatland Arrow (1998-2002).
Operation Peatland Arrow was the NATO operation name of the 3rd Atlantean Conflict. Said conflict, lasting from November 19, 1998 to October 8, 2002, was an attempted revolution in and secession of the 5 American states of Atlantis (capital: Brisbane), Meropis (capital: Constantinople), New Lancaster (capital: Pleasantville), Tasmania (capital: New Amsterdam), and Franklin (capital: Presidia) by an ultranationalist insurgency of the indigenous Mayda peoples (descendants of various early European, African, and Indigenous American peoples, often known simply as Aboriginal Atlanteans) looking for the independence of the subcontinent, known as the Liberation and Defense Force of Mu. (Mu is the indigenous name of Atlantis)
Multiple other insurgencies done in response, notably one by the extremely peculiar Atlantean Free Corps, a Strasserist white supremacist paramilitary with links to both the Ku Klux Klan and the Russian National Bolshevik Party, led to the beginning of what could only be described as "The Troubles on steroids".
The most notorious event in the conflict's history was the seizure of a silo of a Minuteman III nuclear missile by the Army of Supreme Truth, a militia directly linked to Aum Shinrikyo. The seizure lead to the issuing of an Emergency Action Notification, despite every attempt of the militiamen to launch the missiles failing due to the complete lack of missile launch experience of
every single member of the militia.