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"Autumn 1916 - after intense fighting along the Somme, German infantry briefly rest behind the sturdy walls of their fortified front-line trench.  Whilst some keep their eyes trained on the battle-scarred landscape beyond, their colleagues find time to relax alongside the unit's pet dog as a pair of Albatross fighters patrol overhead."
<https://aceshighgallery.com/product/guarding-the-line/>