The title is a play on the first words of Dulce et decorum est pro patria mori, the Latin phrase meaning "It is sweet and fitting to die for one's country."
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The words attributed to Trumpeldor are clearly a variant of the well known saying "Dulce et decorum est pro patria mori" ("It is sweet and fitting to die for one's country"), derived from the Odes of the Roman poet Horace - lines with which Trumpeldor, like other educated Europeans of the time, may have been familiar with.