"Operation Enduring Freedom" (OEF) is the official name used by the U.S. government for the War in Afghanistan, together with a number of smaller military actions, under the umbrella of the Global "War on Terror" (GWOT).

The operation was originally called "Operation Infinite Justice" (often misquoted as "Operation Ultimate Justice"), but as similar phrases have been used by adherents of several religions as an exclusive description of God, it is believed to have been changed to avoid offense to Muslims, who are the majority religion in Afghanistan U.S. President George W. Bush's remark that "this crusade, this war on terrorism, is going to take a while", which prompted widespread criticism from the Islamic world, may also have contributed to the renaming of the operation.