A US military judge has filed terror charges against an Australian held without trial at Guantanamo Bay for five years.
David Hicks has complained about his treatment
David Hicks, 31, is charged with "providing material support for terrorism", a Pentagon statement said.
The decision comes despite Australian officials asking the United States not to bring such charges.
Mr Hicks was detained in Afghanistan, where he allegedly fought alongside the ruling Taleban against US-led forces.
Mr Hicks will be the first Guantanamo Bay detainee to be charged under a new US law authorising special military trials of "enemy combatants".
A preliminary hearing is expected to be held within 30 days and a jury trial will start within 120 days in accordance with the Military Commissions Act of 2006.
Mr Hicks pleaded not guilty to charges of conspiracy, attempted murder and aiding the enemy before a US military tribunal in 2004, but the charges were dropped when the US Supreme Court ruled that the judicial process was unlawful.
US Vice-President Dick Cheney has said that Mr Hicks would serve his sentence in Australia if convicted.
Both Mr Hicks' lawyers and family have been pushing for a resolution to his situation, saying they fear for his mental health after such a long time in detention without trial.