 Marlbrough s'en va-t-en guerre

"Marlbrough s'en va-t-en guerre" or "Malbrook s'en va-t-en guerre" ("Marlborough Has Left for the War" also known as "Mort et convoi de l'invincible Malbrough", "The Death and Burial of the Invincible Marlbrough") is a popular folk song in French.The burlesque lament on the death of John Churchill, 1st Duke of Marlborough (1650–1722) was written on a false rumour of that event after the Battle of Malplaquet in 1709, the bloodiest battle of the War of the Spanish Succession.