There have been games that question morality, here's one that did it first.

Released in 1993, Cannon Fodder is a top down tactical shooter built on the same engine as Sensible Soccer. You sortie with a small selection of troops and battle through missions. Although the tagline is "War has never been so much fun" all your troops can perma death on one shot and as the replacement troops line up for battle you will see the graves of the fallen on the hill, it even goes through a memorial each time you lose troops on a mission. You will feel how bad war is with the dark and twisted humour.

The opening uses Reggae style music

Pros
Quite a deep strategy game.
Genuinely makes war look bad.
A lot of missions for your money.
Good music.

Cons
Some ports are dreadful.
The controls are nothing but point and click.
Very hard game to finish.

Verdict
It's pretty difficult but the experience is well worth it, just try playing Call of Duty after a long session of this and you'll start feeling awful.