It's still popular today because people general enjoy his music & maybe the genre of music. his lyrics or the story behind the song can having a deep meaning to people.
I believe that it is sapien
Soldiers also made dugouts and funk holes in the side of the trenches to give them some protection from the weather and enemy fire. The front-line trenches were also protected by barbed-wire entanglements and machine-gun posts. Short trenches called saps were dug from the front-trench into No-Man's Land.