It is during 1914 - 1918 Western Front & Eastern Front

The Allied executed a grand battle plan - for 18th time, they will match slowly through no man land into the enemy's machine gunner's line of sight.

Choose your side, German/ Austrian or British/ French/ USA/ Russia (So as the other factions of ww1)

Condition of Central side: You are well fortified in the trench but moral is running low, your commander Manstein is severely wounded in the previous assault. You are his assistant. In case you choose to be a female, you can be either a nurse or a secretary, no strong female tropes for Germans. it will be the very first time you see a tank, no anti tank weapons yet (You can actually extract the bullet and flip the tip over to pierce armor). Please don't be superior.

Condition of Allied side: You will match through no man land, prepare for agonizing minefield, artillery, machine gun fire. At least you have tanks for support and your moral is high. You can be the commander Charles or his assistant. In case you are a female, you won't be joining the assault, you are going to tend the wounded aftermath, only exception is Russian. You will have a bloody victory this time. But Germans got some reinforcement that are coming.

In the trenches: After the Allied crossed the no-man land, there will be a bloody melee in the trench. Dugouts are the most dangerous place, war is a brutal hell, victory depends on how hard you hit your enemy.

Psychological: Addition, if you know Ad Infinitum or other psychological horror theme contents, you can also have it play out here.