"Mrs. McGrath" (also known as "Mrs. McGraw", "My Son Ted", "My Son John", and "The Sergeant and Mrs. McGrath") is an Irish folk song set during the Peninsular War of the early 19th century. The song tells the story of a woman whose son enters the British Army and returns seven years later having lost his legs to a cannonball while fighting against Napoleon presumably at the Battle of Fuentes de Oñoro (fought between 3 and 5 May 1811). The general theme of the song is one of opposition to war. Along with "Johnny I Hardly Knew Ye", it is one of the most graphic of all Irish folk songs that deal with sickness and injuries caused by warfare. Irish folk song collector Colm Ó Lochlainn described "Mrs. Grath" as "known to every true born citizen of Dublin". It was very popular among the Irish Vol