It's generally considered by Maiden fans as one of their best songs and when they perform it live lead singer Bruce Dickinson often wields a giant Union flag and replica army jacket.
Based on a poem by Tennyson, Dickinson would read out parts of the poem as an introduction to the song. In their subsequent 2003 album Dance of Death, Iron Maiden reference the poem again in the song Pachendale.
The Trooper is also one of Maiden's few songs which was played a lot on commercial radio giving it the publicity need to reach no.28 in the US rock charts.
Get your axe out and enjoy The Trooper guitar lesson.