The film The Thin Red Line is about musicians .
Although the title may seem to refer to a line from Rudyard Kipling 's poem `` Tommy `` , from Barrack-Room Ballads , in which he calls foot soldiers `` the thin red line of heroes `` , referring to the stand of the 93rd Regiment in the Battle of Balaclava of the Crimean War , it is in reality a quote from Jones 's book which reads , `` they discover the thin red line that divides the sane from the mad ... and the living from the dead ... ``