"The World Slavery Tour" began in Warsaw, Poland on 9 August 1984 – and is widely regarded as being the band's longest and most arduous to date – and also led to the live album Live After Death. At 13 minutes and 45 seconds in length, it was Iron Maiden's longest song for over 30 years, until it was surpassed by the 18-minute "Empire of the Clouds" from the 2015 album, The Book of Souls.
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