The British troops were defending the Belgian town of Mons from the advancing Germans. On 21 August 1914, shortly before the battle, Jamie Colquhoun and Harry were doing reconnaissance of the town and encountered a Weeping Angel.
Thomas Monaghan heard rumours of Weeping Angels making German soldiers vanish during the battle. Some soldiers believed that those who are touched by an Angel are saved from the horrors of the war. (COMIC: The Weeping Angels of Mons)
Captain Dudgeon fought in the Battle of Mons. In 1917, he told Ace that he saw an angel during the battle. He described the angel as a tall man with wings who was holding a quiver and a bow. Ace had previously heard of the Angels of Mons but believed them to be a myth or mass hysteria. (AUDIO: No Man's Land)
Following the Battle of Mons, German soldiers passed stories about angels on the battlefield. It was said that they came to take the dead to heaven. The Tenth Doctor, travelling with Rose Tyler, called it a load of old nonsense. (COMIC: Warfreekz!)