Shining Armor had to stop there for a moment as he realized that he wasn’t exactly sure what happened a thousand years ago. Really, all he knew was that Sombra was a totalitarian ruler that needed to be stopped. Celestia told everyone that he enslaved the populace and caused the city to disappear for the thousand years he was imprisoned. He knew for a fact that they had more than enough dirt on Sombra to give him life in prison, but he wanted to offer the crystal ponies a more personal touch.