Guelder was the site of the Guelders wars of the early 1500s. (COMIC: Hidden Human History)

When fleeing from a group of Silver Daleks, the Tenth Doctor eventually landed in a field in Guelder to question the Dalek leader why they hadn't been trying to kill him. The Daleks explained that they were to bring him before the Golden Emperor, leading him away. (COMIC: Defender of the Daleks)

The Thirteenth Doctor later returned to that same field and travelled to a nearby town where she was bit by the Stilean flesh eater that would become known as Bethany Brunwine. After Magda had rung the village bell, the flesh eaters scampered back into the shadows. (COMIC: Hidden Human History)

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