A proposed truth commission to investigate torture during military rule in Brazil (1964-1985) have so angered forces chiefs that they threatened to resign. Unlike neighboring countries such as Argentina and Chile, Brazil has never tried anyone for the murder and widespread torture of dissidents during its dictatorship, which pushed an amnesty law through a weak Congress in 1979, granting immunity to state officials involved in torture as well as those in the opposition who had resorted to violence. Military chiefs believe the truth commission is an attempt to get round the amnesty law.