Malbrough s'en va-t-en guerre

 Very popular in the late 18th century. The same tune as For he's a Jolly Good fellow. 

"Malbrough s'en va-t-en guerre" (Marlborough is going off to war), also known as "Mort et convoi de l'invincible Malbrough" (The death and burial of the invincible Marlborough), is a folk song in French.

History

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. It tells how Marlborough's wife, awaiting his return from battle, is given the news of her husband's death. It also tells that he was buried and that a nightingale sang over his grave.