It's August, 1915, and the world is in a tightly locked war as the Entente of the British, French, and Russians attempt to defeat the Triple Alliance, or Central Powers, of the Germans, the Austro-Hunagarians, and the Ottomans. Trench warfare has set in, as the two sides find that the new weapons of war will not deliver the quick victory forecast. And so, the two sides wait in trenches, artillery raining down hell, spellcasters launching massive rains of fire, creating elementals, raising the dead, tanks and men charging forth and being slaughtered- and then the aliens arrive.