E-3 => 'Private First Class'
E-4 => 'Specialist' or 'Corporal'
E-7 => 'Sergeant First Class'
E-8 => 'Master Sergeant' or 'First Sergeant'
E-9 => 'Sergeant Major' or 'Command Sergeant Major' and exactly 1 'Sergeant Major Of The Army'
W-1 => 'Warrant Officer'
W-2..W-5 => 'Chief Warrant Officer'
'O-1' => 'Second Lieutenant',
'O-2' => 'First Lieutenant',
'O-7' => 'Brigadier General',
'O-8' => 'Major General',
'O-9' => 'Lieutenant General',
'0-10' => 'General',
'O-11' => 'General of the Army' (reserved for wartime only)
'O-12' => DOES NOT EXIST
'O-13' => DOES NOT EXIST