A Nation Once Again was voted the world's most popular song according to a BBC World Service global poll of listeners, ahead of "Vande Mataram", the national song of India. Davis copied the melody for the chorus from the second movement of Mozart's clarinet concerto. The lyrics use a simple ABABCDCD rhyme scheme, with verses of eight lines, and alternating lines of iambic tetrameter and iambic trimeter. Davis describes how he learned of ancient fighters for freedom as a boy — the three hundred Spartans who fought at the Battle of Thermopylae. The "three men" may refer to Horatius Cocles and his two companions
I Vow to Thee, My Country are peace" (KJV), in the context of which the feminine pronoun refers to Wisdom. The original first verse of Spring-Rice's poem "Urbs Dei/The Two Father Lands" (1908–1912), never set to music, was as follows: <poem style="margin-left: 2em;"> I heard my country calling, away across the sea, Across the waste of waters, she calls and calls to me. Her sword is girded at her side, her helmet on her head, And around her feet are lying the dying and the dead; I hear the noise of battle, the thunder of her guns; I haste to thee, my mother, a son among