Johnny I Hardly Knew Ye is a popular traditional song, sung to the same tune as "When Johnny Comes Marching Home". First published in London in 1867 and written by Joseph B. Geoghegan, a prolific English songwriter and successful music hall figure, it remained popular in Britain and Ireland and the United States into the early years of the 20th century.

Originally seen as humorous, the song today is considered a powerful anti-war song. Except for an initial framing stanza, the song is a monologue by an Irish woman who meets her former lover on the road to Athy, which is located in County Kildare, Ireland. After their illegitimate child was born, the lover ran away and became a soldier. He was badly disfigured, losing his legs, his arms, his eyes and, in some versions, his nose, in fighting on the island of "Sulloon", or Ceylon (now known as Sri Lanka), and will have to be put in a bowl to beg. In spite of all this, the woman says, she is happy to see him and will keep him on as her beau. Modern versions often end with an anti-war affirmation.

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