On February 9, 1974 everything changed for Abba. They performed "Waterloo" in Swedish andwon the Melodifestivalen contest to choose Sweden's entry for that year's Eurovision Song Contest.
They'd win Eurovision with an English version of the future #1 hit in Belgium, Denmark, Finland, Germany, Ireland, Netherlands, Norway, South Africa, Switzerland and the UK. "Waterloo" peaked at #6 in the US. In France ( despite Abba recording a version with French lyrics), "Waterloo" stalled at #4. Some garcons and filles must have been wondering why so much of the world was taking such joy in a song about their most famous military defeat.