If you want an idea of how infantry conflict (without indirect fire) would be in the future, play this game.
The scenario is that you are one of a surviving team of soldiers/airman (there's one pilot among you) on a planet that is essentially a live-fire training area for an enemy race's military.
Yep, an entire planet that's really one big impact area with a few bases scattered on it.
How did you get there? Well, the spaceship that you were on was carrying a planet buster to plant on the enemy home world (yeah, the war's going *that* badly) was damaged en-route and crashed here. After arming the planet buster, of course.
You have a limited amount of time to either a) steal an enemy spaceship so you can GTF off the planet or b) find the planet buster and disarm it.
You really can win without cheating, but you'll think otherwise more than once.
If you don't read the manual, you won't be able to win the game. You'll just die a lot. Honest.
You can play as the pilot, too. I die a lot doing so, which tells me that my never joining the Air Force was a good idea.