I Was Reincarnated Into a War

NOTE, I have never been in a war and I barely know anything about it, so please forgive me if I make any mistakes, this is just a passion project and because I thought it would be fun to write. Keep in mind that this is a completely fictional story and has nothing to do with the real world, namely WWII and WWI if you feel like it is diverting too much into that territory please feel free to notify me so I can steer the story in the right direction.Liam is a 28 year old male who works the average, life killing 9 to 5, how ever he is almost always forced to go into overtime and has no time for his passion, gaming, so to make up for this he will ignore his bodies need for rest and will instead sit in front of a computer for the rest of the night. His favorite game, "Descriptum", Is a WWII strategy game about micromanaging troops while yourself fighting in the battle. One day his mistreatment of his body causes him to pass out then die shortly after (Surprising, right?), He was then reincarnated (not into the game its not that trope, I promise) as a soldier nicknamed "J" who is about to get dispatched for his squadrons first mission.