Forest of Mormal
From Tardis Wiki, the free Doctor Who reference
The Forest of Mormal was a forest in Belgium. In 1914, during the First World War, the British Army was retreating through the forest. (COMIC: Warfreekz!)
Behind the scenes
Although Warfreekz! places the forest in Belgium, in the real world the forest is in the north of France, close to the Franco-Belgian border.