Battlefield 1918 is a total conversion modification for Battlefield 1942. The mod takes Battlefield 1942 into a whole new scenario, the first world war. Next to historically correct equipments and vehicles, we try to recreate the atmosphere of these WW1 battlefields as close as we can, keeping in mind the game we're working with. To achieve this, we've drastically changed the gameplay from the original game like so that you must now rely on teamwork, artillery, trenches and slow vehicles....
The Battle of Cantigny was fought on 28th May 1918. In Battlefield 1918, this is a classical trench warfare map where an American Infantry regiment has to advance on the German positions around the village of Catigny in nothern France. A lot of barbed wire, trenches and constant maschinegun fire makes the American advance rather difficult.
Also see Firstworldwar.com for further reading.
Holy crap!
Trenches :D