Thomas Jefferson once shot a man on the White House Lawn for treason. The Western world has come a long way since then, and such matters are now subject to our judicial system. In the Australian context, the Criminal Code Act 1995 (Cth), particularly Division 80, specifies actions that constitute treason, including causing harm to the Sovereign, levying war against the Commonwealth, and assisting the enemy or those engaged in armed hostilities against the Australian Defence Force (ADF).