The first prisoners from Afghanistan arrive in Guantanamo. A group of 20 is housed in metal cages at Camp X-Ray.
As the prisoner population swells into the hundreds, detainees are moved to newly constructed Camp Delta, which can house 400.
The first three detainees are released.
A federal appeals court rules that detainees have no legal rights in U.S. courts.
President Bush designates six suspected Al-Qaeda terrorists to be eligible for military tribunals, the first since World War II.
Australian David Hicks becomes the first detainee to get a lawyer.
The U.S. announces that each prisoner's detention will be reviewed on an annual basis by an administrative panel called the Combatant Status Review Tribunal. The CSRTs will conduct preliminary proceedings - not military trials - and detainees will not be permitted lawyers.
Preliminary steps begin for the first full-fledged military commission trials, including the trial of Salim Ahmed Hamdan, alleged driver for Osama Bin Laden.
A federal judge in Washington orders the Pentagon to halt the Hamdan trial, saying that Bush does not have authority to conduct military-commission trials.
The U.S. announces an investigation into allegations that detainees have been tortured.
A federal appeals court upholds Bush's authority to conduct military trials.
A U.N. report recommends that Gitmo be closed.
The Supreme Court rules that Bush lacked the authority to establish military-commission trials without Congress' authorization and scuttles them, saying that they violate U.S. and international law.
The Pentagon announces that all Guantanamo detainees are now entitled to Geneva Convention protections.
Fourteen "high-value" detainees are transferred from secret CIA prisons to Guantanamo for trial.
Bush signs a new military-commission trial law adopted by Congress. The new format permits hearsay evidence but not statements obtained by torture. Defense lawyers are barred from sharing classified evidence with clients without permission of the Pentagon.
The Pentagon announces plan to build a new courtroom on an abandoned airfield at Guantanamo.
A federal judge in Washington rejects a challenge to the new military-commission trial law, setting up an appeal to the U.S. Supreme Court.
As the first military-commission trial is set to begin, Australian detainee David Hicks pleads guilty to supporting terrorism and is sentenced to nine months, a term he will serve in his home country. Hicks becomes the first person convicted in a U.S. war-crimes trial since World War II. Meanwhile, Khalid Sheik Mohammed appears at a CSRT panel and confesses to the Sept. 11 attacks.
The Supreme Court rejects an appeal from Guantanamo Bay detainees to review their detainment.
Military judges in Guantanamo, preparing to hear the first two trials, unexpectedly dismiss charges against two detainees, ruling that the preliminary tribunal identified them only as "enemy combatants," not "unlawful enemy combatants" as the new legislation requires. The government appeals.
A CSRT panel member, breaking his silence, files an affidavit that says the CSRT process is deeply flawed and one-sided. Shortly after, the Supreme Court, reversing course, agrees to review whether the new military-commission law allows U.S. courts to review detainee confinement.
A military appeals court sends the two tribunal cases back to Guantanamo, telling the military judges that they have the authority to determine, on their own, whether the detainees are "unlawful enemy combatants."
Preparations begin anew for the first of dozens of military-commission trials.
Prelimary hearings begin in the case of Canadian national Omar Ahmed Khadr.
The U.S. Supreme Court hears arguments on whether detainees should have access to U.S. civilian courts.