14th September 1814: The poem that provides the lyrics to the United States’ national anthem, The Star Spangled Banner, written by Francis Scott Key

The poem Defence of Fort M’Henry provides an account of the British attack on the United States during the Battle of Baltimore.

30th July 1792: La Marseillaise, the future French national anthem, first sung in Paris by a group of volunteer soldiers from the city of Marseille

La Marseillaise was composed by a French army officer and was originally called the ‘War Song for the Army of the Rhine’ with the aim of rallying soldiers fighting in Strasbourg during the French Revolutionary Wars.