Following the United States Supreme Court decision in "Rasul v. Bush" (2004), in which the court ruled that detainees had habeas corpus rights and could challenge their detention, the US government quickly developed a system of Combatant Status Review Tribunals, Administrative Review Boards, and military commissions to provide the detainees with an "impartial tribunal" for reviewing their cases. Detainees could not call defence lawyers, could not review the evidence against them, and had allegations made that were dependent on hearsay evidence. The British government protested about their citizens being subjected to the planned Guantanamo tribunals, because due process rights would be severely curtailed.