Hmm, nice question. Probably: Verdun being the longest battle in ww1, 2nd battle of Ypres being the battle where gas was used. The Osowiec fortress with the attack of the dead men. Champagne wasn't even chosen cause i like it. Just i wanted some battle with winter in it where French were attacking not Germans. But if i want to keep 1 character my battle choices are limited to the battles that [insert army] particaped it. And i dont mean the whole Army, i mean as in "German 3rd Army, French Fourth Army, Russian [number] Rifle Division" and so on.