Our very own Terrorist cell here in Australia, under the alias Muhammed Dawood (the latter being the Arabic form of "David"), Hicks undertook military training in al Qaeda-linked camps and served with the ruling Taliban in Afghanistan in 2001.
He was later captured in December 2001 by the Afghan Northern Alliance, handed over to the U.S. military, designated an unlawful combatant and then held at Guantanamo Bay, during which he alleged he was mistreated.